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A307276
Partial sums of A307270.
7
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
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
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 02 2019
EXTENSIONS
More terms from Rémy Sigrist, Apr 04 2019
STATUS
approved