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1, 4, 27, 233, 2392, 28554, 393642, 6247511, 113612460, 2349157984, 54693260003, 1419193978899, 40649683449268, 1274332809446116, 43403931028963260, 1596092227004496195, 63024526636437361468, 2659705693841420725200, 119463071327339129567836, 5690148543901378578826660
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refs;
listen;
history;
text;
internal format)
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OFFSET
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0,2
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LINKS
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FORMULA
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a(n) = binomial(2 + 4*n, n)*2F1([1, -n], [-2 - 4*n], 1 + n)/(1 + n), where 2F1 is the hypergeometric function.
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MATHEMATICA
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Table[(Binomial[2+4n, n]Hypergeometric2F1[1, -n, -2-4n, 1+n])/(1+n), {n, 0, 19}]
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CROSSREFS
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KEYWORD
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nonn
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AUTHOR
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STATUS
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approved
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