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A026036
(d(n)-r(n))/5, where d = A006527 and r is the periodic sequence with fundamental period (4,1,4,0,1).
0
0, 2, 4, 9, 15, 23, 35, 49, 68, 90, 116, 148, 184, 227, 275, 329, 391, 459, 536, 620, 712, 814, 924, 1045, 1175, 1315, 1467, 1629, 1804, 1990, 2188, 2400, 2624, 2863, 3115, 3381, 3663, 3959, 4272, 4600, 4944, 5306, 5684, 6081, 6495, 6927, 7379, 7849, 8340, 8850, 9380, 9932, 10504, 11099, 11715
OFFSET
2,2
FORMULA
G.f.: [(2-2x+x^2)(1+x^2)x^3]/[(1-x)^3(1-x^5)].
MATHEMATICA
LinearRecurrence[{3, -3, 1, 0, 1, -3, 3, -1}, {0, 2, 4, 9, 15, 23, 35, 49}, 60] (* Harvey P. Dale, Jun 09 2018 *)
CROSSREFS
Sequence in context: A347473 A025217 A119759 * A072846 A157254 A080004
KEYWORD
nonn,easy
STATUS
approved