A361476 Antidiagonal sums of A361475.

0, 1, 4, 12, 34, 99, 308, 1040, 3820, 15197, 65060, 297828, 1449742, 7468527, 40555732, 231335944, 1381989864, 8623700793, 56078446596, 379233142780, 2662013133274, 19362917621979, 145719550012276, 1133023004941248, 9090156910550084, 75161929739797493, 639793220877941476

Offset

0,3

Links

Table of n, a(n) for n=0..26.

Formula

a(n) = Sum_{k=2..n+2} (k^(n-k+2) - 1)/(k - 1).

a(n) ~ A026898(n).

a(n) = Sum_{k=0..n} k * A104878(n,k). - Alois P. Heinz, Dec 05 2023

Mathematica

A361475[n_, k_]:=(k^n-1)/(k-1); a[n_]:=Sum[A361475[n-k+2, k], {k, 2, n+2}]; Array[a, 27, 0]

Crossrefs

Cf. A026898, A104878, A361475.

Sequence in context: A115390 A005056 A014143 * A077994 A077843 A061703

Adjacent sequences: A361473 A361474 A361475 * A361477 A361478 A361479

Keyword

nonn

Author

Stefano Spezia, Mar 13 2023

Status

approved