25809

Appears in sequences

• Expansion of 1 / ((1 - 3*x)*(1 - 4*x)*(1 - 5*x)*(1 - 8*x)).at n=4A028027
• Number of different strings of length n obtained from "abcdefg" by iteratively duplicating any substring.at n=14A137747
• 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, 0), (-1, 0, 1), (0, 1, -1), (1, -1, 1), (1, 1, 1)}.at n=8A149716
• The RSEG2 triangle.at n=40A161739
• Fifth right hand column of the RSEG2 triangle A161739.at n=3A161741
• Number of lattice paths from (0,0) to (n,n) that do not go above the diagonal x=y and consist of steps (h,v) with h, v prime or one.at n=11A308273
• G.f. A(x) satisfies: A(x) = x * Product_{k>=1} 1/(1 - A(x^k))^k.at n=9A308369
• Squares where knight moving to a lowest unvisited square on a spirally numbered board will have no available moves.at n=15A323714
• a(n) = 2*A276086(n) - A276086(A001065(n)), where A276086 is the primorial base exp-function, and A001065 is the sum of proper divisors of n.at n=55A379494
• a(n) = A276086(1+n) - A276086(A001065(n)), where A276086 is the primorial base exp-function, and A001065 is the sum of proper divisors of n.at n=55A379498