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A126119
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Numerators of sequence of fractions with e.g.f. (1+x)/(1-x)^(3/2).
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2
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1, 5, 27, 195, 1785, 19845, 259875, 3918915, 66891825, 1274998725, 26843892075, 618718975875, 15495473018025, 419010239773125, 12167108660581875, 377607284571391875, 12473420957563190625, 436953531082636693125, 16179945969799083346875, 631461179013117650071875
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,2
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COMMENTS
| Denominators are successive powers of 2.
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FORMULA
| E.g.f.: (1+2*x)/(1-2*x)^(3/2)
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EXAMPLE
| The fractions are 1, 5/2, 27/4, 195/8, 1785/16, 19845/32, 259875/64, ...
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PROG
| (PARI) {a(n)= if(n<0, 0, n!* polcoeff( (1+2*x)/ (1-2*x +x*O(x^n))^(3/2), n))} /* Michael Somos Apr 08 2007 */
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CROSSREFS
| Cf. A001174, A126115.
Sequence in context: A185622 A205774 A023811 * A105631 A167019 A204266
Adjacent sequences: A126116 A126117 A126118 * A126120 A126121 A126122
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KEYWORD
| nonn,frac
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Mar 22 2007
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