A026712 a(n) = Sum{T(i,j)}, 0<=i<=n, 0<=j<=n, T given by A026703.

1, 3, 8, 20, 47, 111, 252, 582, 1303, 2977, 6618, 15028, 33269, 75255, 166152, 374860, 826115, 1860407, 4094612, 9208832, 20248703, 45495079, 99965896, 224440544, 492900919, 1106034259, 2428024608, 5446009600, 11951707547

Offset

0,2

Links

Table of n, a(n) for n=0..28.

Crossrefs

Sequence in context: A050231 A136305 A284943 * A308370 A050232 A050233

Adjacent sequences: A026709 A026710 A026711 * A026713 A026714 A026715

Keyword

nonn

Author

Clark Kimberling

Status

approved