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A126459
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Column 1 of triangle A126457; a(n) = C( C(n+3,3) + 2, n).
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5
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1, 6, 66, 1540, 66045, 4582116, 470155077, 66983637864, 12655529067060, 3062465626261470, 923729223066105456, 339813167168828020668, 149762733221010818774320, 77904783726874238769542600
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OFFSET
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0,2
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LINKS
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PROG
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(PARI) a(n)=binomial((n+1)*(n+2)*(n+3)/3!+2, n)
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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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