19566

Appears in sequences

• 33-gonal numbers: n(31n-29)/2.at n=36A098923
• Number of partitions of n with exactly one prime number.at n=46A132381
• Ulam's spiral (NNW spoke).at n=35A143860
• Number of ways to place 3 points on a triangular grid of side n so that no two of them are adjacent.at n=8A239569
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 585", based on the 5-celled von Neumann neighborhood.at n=27A273075
• Expansion of 2*(1 - x)/(3 - theta_3(x)), where theta_3() is the Jacobi theta function.at n=34A303909
• Number T(n,k) of colored compositions of n using all colors of a k-set such that all parts have different color patterns and the patterns for parts i are sorted and have i colors in (weakly) increasing order; triangle T(n,k), n>=0, 0<=k<=n, read by rows.at n=34A327244