61764

Appears in sequences

• a(n) = Sum_{k=0..m} (k+1) * A026120(n, k), where m=0 for n=0,1; m=n for n >= 2.at n=9A027326
• 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, 0, 0), (0, -1, 1), (0, 1, -1), (1, 0, 1), (1, 1, 0)}.at n=8A150843
• The number of binary Niven numbers (A049445) not exceeding 2^n.at n=18A337078
• Triangle read by rows: T(n,k) = n! * coefficient of m^k in the polynomial counting labeled digraphs with m nodes and n arcs and without directed paths of length >= 2, with 0 <= k <= 2*n.at n=27A387663