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The Catalan numbers are a sequence of natural numbers that occur in various counting problems, often involving recursively defined objects. They are named after Eugène Catalan, though they were previously discovered in the 1730s by Minggatu. The n-th Catalan number can be expressed directly in terms of the central binomial coefficients by
Download as PDF; Printable version ... The number of noncrossing partitions of a set of n elements is the nth Catalan number. ... number 4, pages 333–350, 1972 ...
Whilst the above is a concrete example Catalan numbers, similar problems can be evaluated using Fuss-Catalan formula: Computer Stack : ways of arranging and completing a computer stack of instructions, each time step 1 instruction is processed and p new instructions arrive randomly.
The only known Catalan pseudoprimes are: 5907, 1194649, and 12327121 (sequence A163209 in the OEIS) with the latter two being squares of Wieferich primes. In general, if p is a Wieferich prime, then p 2 is a Catalan pseudoprime.
Substituting k = 1 into this formula gives the Catalan numbers and substituting k = 2 into this formula gives the Schröder–Hipparchus numbers. [7] In connection with the property of Schröder–Hipparchus numbers of counting faces of an associahedron, the number of vertices of the associahedron is given by the Catalan numbers.
The following other wikis use this file: Usage on cs.wikipedia.org Catalanova čísla; Usage on de.wikipedia.org Catalan-Zahl; Diskussion:Catalan-Zahl
Print/export Download as PDF; Printable version; In other projects ... Catalan number; Fuss–Catalan number; Central binomial coefficient;
Eugène Charles Catalan (French pronunciation: [øʒɛn ʃaʁl katalɑ̃]; 30 May 1814 – 14 February 1894) [2] was a French and Belgian mathematician who worked on continued fractions, descriptive geometry, number theory and combinatorics.