124996

Appears in sequences

• Shifts left when INVERT transform applied thrice.at n=8A007564
• Triangle derived from an array of f(x), Narayana polynomials.at n=62A204057
• Numbers whose squares have 2R-1 digits, such that the number represented by leftmost R digits and number represented by rightmost R digits divide each other evenly.at n=27A216233
• Number of idempotent 4X4 0..n matrices of rank 3.at n=23A224335
• Positive solutions of Monkey and Coconuts Problem for the classic case (5 sailors, 1 coconut to the monkey): a(n) = 15625*n - 4 for n >= 1.at n=7A254029
• Riordan array (1, x*f(x)) where f(x) is the g.f. of A007564.at n=46A265435
• Square array T(n,k), n>=0, k>=0, read by antidiagonals, where T(0,k) = 1 and T(n,k) = (1/n) * Sum_{j=1..n} 2^(n-j) * binomial(n,j) * binomial(n+(k-1)*j,j-1) for n > 0.at n=63A336707