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A055579
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Binomial(12*n-1,3*n-1)/((6*n-1)*(12*n-1))
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0
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1, 133, 39556, 16112057, 7772368380, 4168218286276, 2403705165816240, 1461462393790971585, 925088518413937893358, 604420266372219374357644, 405139322689963395796890100, 277349882927724253636179972980
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,2
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REFERENCES
| C. O. Oakley and R. J. Wisner, Flexagons, Amer. Math. Monthly, 64 (1957), 143-154, see p. 151.
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MATHEMATICA
| Table[Binomial[12n-1, 3n-1]/((6n-1)(12n-1)), {n, 20}] (* From Harvey P. Dale, Nov 02 2011 *)
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CROSSREFS
| Sequence in context: A129050 A129049 A015264 * A191715 A061491 A048128
Adjacent sequences: A055576 A055577 A055578 * A055580 A055581 A055582
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KEYWORD
| nonn
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AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com), Aug 24 2000
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