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A301302 Partial sums of A301301. 0
1, 5, 13, 25, 41, 61, 86, 116, 150, 189, 232, 279, 332, 388, 448, 513, 581, 656, 734, 815, 902, 991, 1088, 1188, 1290, 1399, 1509, 1628, 1750, 1873, 2004, 2135, 2276, 2420, 2564, 2717, 2869, 3032, 3198, 3363, 3538, 3711, 3896, 4084, 4270, 4467, 4661, 4868, 5078, 5285, 5504 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

Table of n, a(n) for n=0..50.

FORMULA

Conjectures from Colin Barker, Apr 07 2018: (Start)

G.f.: (1 + x)^2*(1 + 2*x + 3*x^2 + 4*x^3 + 5*x^4 + 4*x^5 + 4*x^6 + 2*x^7 + 2*x^8 + x^9 + x^12 - 2*x^13 + x^14 - x^15) / ((1 - x)^3*(1 + x + x^2 + x^3 + x^4)^2).

a(n) = a(n-1) + 2*a(n-5) - 2*a(n-6) - a(n-10) + a(n-11) for n>12.

(End)

CROSSREFS

Cf. A301301.

Sequence in context: A096891 A001844 A099776 * A133322 A299258 A301671

Adjacent sequences:  A301299 A301300 A301301 * A301303 A301304 A301305

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Mar 25 2018

STATUS

approved

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Last modified October 17 19:44 EDT 2019. Contains 328128 sequences. (Running on oeis4.)