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A126458
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Column 0 of triangle A126457; a(n) = C( C(n+2,3) + 3, n).
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5
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1, 4, 21, 286, 8855, 501942, 45057474, 5843355957, 1029873432159, 236236542585120, 68292983465630781, 24268885951464043344, 10392619362579990298763, 5276256293478688846049120
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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*(n+1)*(n+2)/3!+3, 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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