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A362210 Expansion of 1/(1 - x/(1-9*x)^(2/3)). 3
1, 1, 7, 58, 505, 4498, 40576, 368965, 3373225, 30958240, 284934754, 2628211291, 24283705558, 224677646416, 2081054132179, 19293026227024, 178996540057615, 1661743445778403, 15435351753092176, 143439377236572826, 1333496145331028230 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
FORMULA
a(n) = Sum_{k=0..n} (-9)^k * binomial(-2*(n-k)/3,k) = Sum_{k=0..n} 9^(n-k) * binomial(n-k/3-1,n-k).
PROG
(PARI) my(N=30, x='x+O('x^N)); Vec(1/(1-x/(1-9*x)^(2/3)))
CROSSREFS
Cf. A362206.
Sequence in context: A051816 A015566 A238810 * A334610 A244469 A006193
KEYWORD
nonn,easy
AUTHOR
Seiichi Manyama, Apr 11 2023
STATUS
approved

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Last modified July 18 16:59 EDT 2024. Contains 374388 sequences. (Running on oeis4.)