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A028357 Partial sums of A028356. 2
1, 3, 6, 10, 13, 15, 16, 18, 21, 25, 28, 30, 31, 33, 36, 40, 43, 45, 46, 48, 51, 55, 58, 60, 61, 63, 66, 70, 73, 75, 76, 78, 81, 85, 88, 90, 91, 93, 96, 100, 103, 105, 106, 108, 111, 115, 118, 120, 121, 123, 126 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

LINKS

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

Index entries for linear recurrences with constant coefficients, signature (2,-1,-1,2,-1).

FORMULA

G.f.: ( 1+x+2*x^3+x^2 ) / ( (1+x)*(x^2-x+1)*(x-1)^2 ). - R. J. Mathar, Dec 15 2015

CROSSREFS

Cf. A047401. - Jeremy Gardiner, Jul 20 2013.

Sequence in context: A164114 A167219 A264762 * A310047 A310048 A310049

Adjacent sequences:  A028354 A028355 A028356 * A028358 A028359 A028360

KEYWORD

nonn,easy

AUTHOR

N. J. A. Sloane.

STATUS

approved

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Last modified May 29 04:27 EDT 2020. Contains 334696 sequences. (Running on oeis4.)