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A139379 A Jacobsthal Catalan convolution. 1
0, 1, 2, 6, 15, 41, 113, 327, 982, 3066, 9892, 32820, 111390, 385042, 1350722, 4795246, 17191535, 62139697, 226167557, 828085651, 3047683955, 11267975677, 41829610607, 155848125601, 582566960465, 2184167358991, 8211247681373 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

Second column of A139377. Row sums of A139377 give a(n+1).

FORMULA

G.f.: xc(x)/(1-x-2x^2), c(x) the g.f. of A000108; a(n)=sum{k=0..n, A000108(k)*A001045(n-k)};

CROSSREFS

Sequence in context: A074446 A180666 A121328 * A065178 A178936 A148438

Adjacent sequences:  A139376 A139377 A139378 * A139380 A139381 A139382

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 15 2008

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Last modified February 17 00:09 EST 2012. Contains 205978 sequences.