85128

Appears in sequences

• Central terms of pendular triangle A118345.at n=7A118346
• Convolution triangle, read by rows, where diagonals are successive self-convolutions of A118346.at n=43A118349
• Triangle read by rows: a(n,k) is the number of permutations of n elements with prefix transposition distance equal to k.at n=40A164645
• 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=62A336707