A348228 Partial sums of A348227.

1, 5, 17, 37, 71, 109, 163, 217, 291, 361, 455, 541, 655, 757, 891, 1009, 1163, 1297, 1471, 1621, 1815, 1981, 2195, 2377, 2611, 2809, 3063, 3277, 3551, 3781, 4075, 4321, 4635, 4897, 5231, 5509, 5863, 6157, 6531, 6841, 7235, 7561, 7975, 8317, 8751, 9109, 9563, 9937, 10411

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..10000

Formula

See A348227 for G.f.

Mathematica

A348228list[nmax_]:=Accumulate[PadRight[{1, 4, 12, 20}, nmax+1, Array[9#+(#-2)(-1)^#-4&, nmax+1, 0]]]; A348228list[100] (* Paolo Xausa, Aug 06 2023 *)

Crossrefs

Cf. A348227.

Sequence in context: A162373 A146781 A338277 * A107199 A048209 A181423

Adjacent sequences: A348225 A348226 A348227 * A348229 A348230 A348231

Keyword

nonn

Author

N. J. A. Sloane, Oct 08 2021

Status

approved