252720

Appears in sequences

• Number of reversible strings with n labeled beads of 3 colors, no palindromes of more than 1 bead.at n=5A032070
• Triangle with n >= k >= 0 where a(n,k) = 2^k*3^(n-k)*(C(n+1,0)+C(n+1,1)+...C(n+1,k)).at n=39A061929
• Number of strings of length n over Z_6 with trace 0 and subtrace 5.at n=8A073976
• Number of strings of length n over Z_6 with trace 3 and subtrace 5.at n=8A073994
• Expansion of (1-sqrt(1-4*log(1+x)))/2.at n=6A087138
• 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, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 1)}.at n=9A150829
• Sum of divisors of Motzkin number A001006(n).at n=14A152981
• Number of compositions of n into floor(j/3) kinds of j's for all j>=1.at n=32A176848
• Number of 5-turn bishop's tours on an n X n board summed over all starting positions.at n=7A188780
• Triangle S(n,k) by rows: coefficients of 3^(n/2)*(x^(2/3)*d/dx)^n when n=0,2,4,6,...at n=25A223526
• Square array read by antidiagonals downwards: super Patalan numbers of order 3.at n=48A248324
• Expansion of e.g.f. 1 / sqrt(1 + x^2 * log(1 - x)).at n=9A375698