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A109074
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Numerator of binomial(6*n-2,2*n)/(2*binomial(4*n-1,2*n)).
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2
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1, 1, 3, 26, 323, 2415, 26970, 66526, 717541, 278992987, 30741431, 753069156, 21291561634, 1258540885373, 11255629805034, 833378477982, 181778972767041, 101220208716435, 644821697046585, 4759584409762049637, 7692170694126370209, 19898042621084590853
(list; graph; refs; listen; history; internal format)
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OFFSET
| 0,3
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COMMENTS
| It is conjectured that binomial(6*n-2,2*n)/(2*binomial(4*n-1,2*n)) = A005156(n+1)/A005156(n).
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REFERENCES
| D. M. Bressoud, Proofs and Confirmations, Camb. Univ. Press, 1999; see conjecture (6.18).
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EXAMPLE
| 1/2, 1, 3, 26/3, 323/13, 2415/34, 26970/133, 66526/115, 717541/435, 278992987/59334, 30741431/2294, ...
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CROSSREFS
| Cf. A134357, A005156.
Sequence in context: A053972 A204561 A126738 * A119293 A136046 A206404
Adjacent sequences: A109071 A109072 A109073 * A109075 A109076 A109077
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KEYWORD
| nonn,frac
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), May 04 2008
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