A115238 Row sums of triangle A115237.

1, 3, 9, 19, 38, 65, 108, 165, 247, 350, 489, 658, 876, 1134, 1456, 1830, 2285, 2805, 3425, 4125, 4946, 5863, 6924, 8099, 9443, 10920, 12593, 14420, 16472, 18700, 21184, 23868, 26841, 30039, 33561, 37335, 41470, 45885, 50700, 55825, 61391

Offset

0,2

Links

G. C. Greubel, Table of n, a(n) for n = 0..10000

Formula

G.f.: (1+x+2*x^2+2*x^3+x^4)/((1-x)^2*(1-x^2)^2*(1-x^4)). - corrected by G. C. Greubel, Feb 06 2016

Mathematica

f := Series[(1 + x + 2*x^2 + 2*x^3 + x^4)/((1 - x)^2*(1 - x^2)^2*(1 - x^4)), {x, 0, 100}]; CoefficientList[f, x] (* G. C. Greubel, Feb 06 2016 *)

Crossrefs

Sequence in context: A146050 A147500 A300445 * A005994 A080010 A135117

Adjacent sequences: A115235 A115236 A115237 * A115239 A115240 A115241

Keyword

nonn,easy

Author

Christian G. Bower, Jan 17 2006

Status

approved