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Search: id:A098658
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| 1, 6, 54, 540, 5670, 61236, 673596, 7505784, 84440070, 956987460, 10909657044, 124965162504, 1437099368796, 16581915793800, 191876454185400, 2225766868550640, 25874539846901190, 301362287628613860
(list; graph; listen)
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OFFSET
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0,2
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COMMENT
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Sixth binomial transform of 1/sqrt(1-36x^2).
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REFERENCES
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Tony D. Noe, On the Divisibility of Generalized Central Trinomial Coefficients, Journal of Integer Sequences, Vol. 9 (2006), Article 06.2.7.
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FORMULA
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G.f.: 1/sqrt((1-6x)^2-36x^2)=1/sqrt(1-12x); E.g.f.: exp(6x)BesselI(0, 6x); a(n)=[t^n](1+6t+9t^2)^n.
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CROSSREFS
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Cf. A059304.
Adjacent sequences: A098655 A098656 A098657 this_sequence A098659 A098660 A098661
Sequence in context: A065088 A092810 A092472 this_sequence A109576 A069726 A081132
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KEYWORD
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easy,nonn
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AUTHOR
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Paul Barry (pbarry(AT)wit.ie), Sep 20 2004
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