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A126456
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Column 1 of triangle A126454; a(n) = C( C(n+3,3) + 1, n).
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5
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1, 5, 55, 1330, 58905, 4187106, 437353560, 63140314380, 12049276177620, 2938311614386005, 891655291709643461, 329600203128234828790, 145830232567505064233200, 76102715775896720790887700
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OFFSET
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0,2
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LINKS
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MATHEMATICA
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Table[Binomial[Binomial[n+3, 3]+1, n], {n, 0, 20}] (* Harvey P. Dale, Feb 03 2015 *)
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PROG
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(PARI) a(n)=binomial((n+1)*(n+2)*(n+3)/3!+1, 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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