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Look-and-say sequence. The lines show the growth of the numbers of digits in the look-and-say sequences with starting points 23 (red), 1 (blue), 13 (violet), 312 (green). These lines (when represented in a logarithmic vertical scale) tend to straight lines whose slopes coincide with Conway's constant. In mathematics, the look-and-say sequence ...
The first block is a unit block and the dashed line represents the infinite sum of the sequence, a number that it will forever approach but never touch: 2, 3/2, and 4/3 respectively. A geometric progression, also known as a geometric sequence, is a mathematical sequence of non-zero numbers where each term after the first is found by multiplying ...
Download as PDF; Printable version; ... The number of free polyominoes with n ... whether or not that number is already in the sequence. A005132: Look-and-say ...
The Feynman Lectures on Physics. The Feynman Lectures on Physics is a physics textbook based on a great number of lectures by Richard Feynman, a Nobel laureate who has sometimes been called "The Great Explainer". [1] The lectures were presented before undergraduate students at the California Institute of Technology (Caltech), during 1961–1964.
The On-Line Encyclopedia of Integer Sequences (OEIS) is an online database of integer sequences. It was created and maintained by Neil Sloane while researching at AT&T Labs. He transferred the intellectual property and hosting of the OEIS to the OEIS Foundation in 2009. [4] Sloane is the chairman of the OEIS Foundation.
Centered hexagonal number. Tetrahedral number. Pyramidal number. Triangular pyramidal number. Square pyramidal number. Pentagonal pyramidal number. Hexagonal pyramidal number. Heptagonal pyramidal number. Octahedral number.
In the SVG image, hover over an arc or label to highlight it and show its statistics. In mathematics, the Kolakoski sequence, sometimes also known as the Oldenburger–Kolakoski sequence, [1] is an infinite sequence of symbols {1,2} that is the sequence of run lengths in its own run-length encoding. [2] It is named after the recreational ...
Some of the major unsolved problems in physics are theoretical, meaning that existing theories seem incapable of explaining a certain observed phenomenon or experimental result. The others are experimental, meaning that there is a difficulty in creating an experiment to test a proposed theory or investigate a phenomenon in greater detail.