A307272 Partial sums of A307202.

1, 4, 13, 28, 49, 73, 103, 145, 187, 232, 283, 352, 415, 481, 553, 649, 733, 820, 913, 1036, 1141, 1249, 1363, 1513, 1639, 1768, 1903, 2080, 2227, 2377, 2533, 2737, 2905, 3076, 3253, 3484, 3673, 3865, 4063, 4321, 4531, 4744, 4963, 5248, 5479, 5713, 5953, 6265

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 + 15*x^3 + 19*x^4 + 18*x^5 + 12*x^6 + 12*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. A307202.

Sequence in context: A220745 A298017 A356984 * A056107 A155433 A272746

Adjacent sequences: A307269 A307270 A307271 * A307273 A307274 A307275

Keyword

nonn

Author

N. J. A. Sloane, Apr 02 2019

Extensions

More terms from Rémy Sigrist, Apr 04 2019

Status

approved