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  2. Palindrome - Wikipedia

    en.wikipedia.org/wiki/Palindrome

    The concept of a palindrome can be dated to the 3rd-century BCE, although no examples survive. The earliest known examples are the 1st-century CE Latin acrostic word square, the Sator Square (which contains both word and sentence palindromes), and the 4th-century Greek Byzantine sentence palindrome nipson anomemata me monan opsin. [2] [3]

  3. Palindromic number - Wikipedia

    en.wikipedia.org/wiki/Palindromic_number

    The first nine terms of the sequence 1 2, 11 2, 111 2, 1111 2, ... form the palindromes 1, 121, 12321, 1234321, ... (sequence A002477 in the OEIS) The only known non-palindromic number whose cube is a palindrome is 2201, and it is a conjecture the fourth root of all the palindrome fourth powers are a palindrome with 100000...000001 (10 n + 1).

  4. 26 Palindrome Examples: Words and Phrases That Are the ... - AOL

    www.aol.com/26-palindrome-examples-words-phrases...

    The word “palindrome” might look a little intimidating, but all it means is a word, verse, sentence, or number that’s the same forward and backward––and trust us, after you see these ...

  5. Ambigram - Wikipedia

    en.wikipedia.org/wiki/Ambigram

    In mathematics, a palindromic number (also known as a numeral palindrome) is a number that remains the same when its digits are reversed through a vertical axis (but not necessarily visually). The palindromic numbers containing only 1, 8, and 0, constitute natural numeric ambigrams (visually symmetrical through a mirror ).

  6. List of English palindromic phrases - Wikipedia

    en.wikipedia.org/wiki/List_of_English...

    A palindrome is a word, number, phrase, or other sequence of symbols that reads the same backwards as forwards, such as the sentence: "A man, a plan, a canal – Panama". ". Following is a list of palindromic phrases of two or more words in the English language, found in multiple independent collections of palindromic phra

  7. 26 Palindrome Examples: Words and Phrases That Are the ... - AOL

    www.aol.com/lifestyle/26-palindrome-examples...

    The post 26 Palindrome Examples: Words and Phrases That Are the Same Backwards and Forwards appeared first on Reader's Digest. Palindrome words are spelled the same backward and forward.

  8. Palindromic prime - Wikipedia

    en.wikipedia.org/wiki/Palindromic_prime

    In mathematics, a palindromic prime (sometimes called a palprime [1]) is a prime number that is also a palindromic number. Palindromicity depends on the base of the number system and its notational conventions, while primality is independent of such concerns. The first few decimal palindromic primes are:

  9. Lychrel number - Wikipedia

    en.wikipedia.org/wiki/Lychrel_number

    A Lychrel number is a natural number that cannot form a palindrome through the iterative process of repeatedly reversing its digits and adding the resulting numbers. This process is sometimes called the 196-algorithm, after the most famous number associated with the process.