2296777

Appears in sequences

• Expansion of e.g.f. exp(-x)/(1-4*x).at n=6A001907
• Base 6 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,1.at n=8A037539
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of the e.g.f. exp(-x)/(1 - k*x).at n=61A320032
• Triangle read by rows: T(n, k) = n! * 4^k * hypergeom([-k], [-n], -1/4).at n=27A375612