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A115238 Row sums of triangle A115237. 2
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 (list; graph; refs; listen; history; text; internal format)
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: A146694 A146050 A147500 * A005994 A080010 A135117

Adjacent sequences:  A115235 A115236 A115237 * A115239 A115240 A115241

KEYWORD

nonn,easy

AUTHOR

Christian G. Bower, Jan 17 2006

STATUS

approved

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Last modified February 23 02:43 EST 2018. Contains 299473 sequences. (Running on oeis4.)