A307276 Partial sums of A307270.

1, 4, 10, 19, 32, 50, 77, 108, 142, 183, 233, 291, 352, 416, 491, 572, 654, 739, 839, 943, 1046, 1152, 1277, 1404, 1528, 1655, 1805, 1955, 2100, 2248, 2423, 2596, 2762, 2931, 3131, 3327, 3514, 3704, 3929, 4148, 4356, 4567, 4817, 5059, 5288, 5520, 5795, 6060

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 + 6*x^2 + 9*x^3 + 11*x^4 + 12*x^5 + 15*x^6 + 13*x^7 + 9*x^8 + 8*x^9 + 2*x^10 + 5*x^11 + 6*x^12 + 2*x^14 - 4*x^15 - 6*x^16 - 2*x^17) / ((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>17.

(End)

Crossrefs

Cf. A307270.

Sequence in context: A301092 A009868 A132922 * A008040 A009871 A008049

Adjacent sequences: A307273 A307274 A307275 * A307277 A307278 A307279

Keyword

nonn

Author

N. J. A. Sloane, Apr 02 2019

Extensions

More terms from Rémy Sigrist, Apr 04 2019

Status

approved