A028357 Partial sums of A028356.

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

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