20363

Appears in sequences

• Indices of primes in sequence defined by A(0) = 11, A(n) = 10*A(n-1) + 61 for n > 0.at n=7A056248
• Number of walks within N^3 (the first octant of Z^3) starting at (0,0,0) and consisting of n steps taken from {(-1, -1, -1), (-1, -1, 0), (-1, 0, 1), (1, 0, 0), (1, 1, 0)}.at n=8A150308
• Number of ordered triples (w,x,y) with all terms in {1,...,n} and 2w^3<=x^3+y^3.at n=32A211807
• Number of identity trees with n nodes where the maximal outdegree (branching factor) equals 7.at n=6A245752
• Number of (3+1) X (n+1) 0..1 arrays with every 2 X 2 subblock ne-sw antidiagonal difference nondecreasing horizontally and nw+se diagonal sum nondecreasing vertically.at n=20A258556
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 633", based on the 5-celled von Neumann neighborhood.at n=25A273301
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 918", based on the 5-celled von Neumann neighborhood.at n=34A273748
• Expansion of (A(x)^2-A(x^2))/2 where A(x) = A001006(x)-1.at n=12A275210
• Number of subsets of {1,2,...,n} such that no two elements differ by 2 or 5.at n=23A375977
• Expansion of (1/x) * Series_Reversion( x * (1 - x^2 * (1 + x)^3) / (1 + x)^2 ).at n=7A387668