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A115203
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Sixth column of triangle A115193 (called C(1,2)).
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1
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1, 11, 93, 723, 5437, 40323, 297469, 2191875, 16164861, 119443459, 884719613, 6570430467, 48927031293, 365303660547, 2734459846653, 20518848036867, 154328140087293, 1163305103130627, 8787088644243453
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Also fifth diagonal of triangle A115195, called Y(1,2), divided by 16.
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FORMULA
| a(n)= A115195(4+n,1+n)/16, n>=0.
G.f.: (-1 + 5*x -2*x^2 + (1- 7*x + 8*x^2)*c(2*x))/(8*(1+x)*x^4) with the o.g.f. c(x) of A000108 (Catalan).
G.f. is also: ((1 + 2*x*c(2*x))*(2*x*c(2*x))^5)/(32*(1+x)*x^5).
a(n)= A115193(5+n,5), n>=0.
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CROSSREFS
| Sequence in context: A025507 A081575 A016150 * A164547 A016203 A051446
Adjacent sequences: A115200 A115201 A115202 * A115204 A115205 A115206
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KEYWORD
| nonn
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AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de), Feb 03 2006
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