A307271 Partial sums of A307201.

1, 4, 13, 25, 46, 76, 106, 139, 181, 238, 289, 343, 406, 490, 562, 637, 721, 832, 925, 1021, 1126, 1264, 1378, 1495, 1621, 1786, 1921, 2059, 2206, 2398, 2554, 2713, 2881, 3100, 3277, 3457, 3646, 3892, 4090, 4291, 4501, 4774, 4993, 5215, 5446, 5746, 5986, 6229

Offset

0,2

Comments

Computed by Davide M. Proserpio using ToposPro, Apr 01 2019

Links

Rémy Sigrist, Table of n, a(n) for n = 0..1000

Formula

Conjectures from Colin Barker, Apr 04 2019: (Start)

G.f.: (1 + 3*x + 9*x^2 + 12*x^3 + 19*x^4 + 24*x^5 + 12*x^6 + 9*x^7 + x^8) / ((1 - x)^3*(1 + x)^2*(1 + x^2)^2).

a(n) = a(n-1) + 2*a(n-4) - 2*a(n-5) - a(n-8) + a(n-9) for n>8.

(End)

Crossrefs

Cf. A307201.

Sequence in context: A273414 A154820 A056708 * A333297 A092484 A091823

Adjacent sequences: A307268 A307269 A307270 * A307272 A307273 A307274

Keyword

nonn

Author

N. J. A. Sloane, Apr 02 2019

Extensions

More terms from Rémy Sigrist, Apr 04 2019

Status

approved