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A218496
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4th iteration of the hyperbinomial transform on the sequence of 1's.
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3
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1, 5, 33, 281, 2993, 38705, 592489, 10516441, 212841889, 4845154913, 122664558905, 3421333467689, 104297273041969, 3451364116327249, 123251578626936841, 4725537745859375705, 193647372258547916609, 8447809104669814884545, 390938955429073736493145
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OFFSET
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0,2
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COMMENTS
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See A088956 for the definition of the hyperbinomial transform.
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LINKS
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FORMULA
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E.g.f.: exp(x) * (-LambertW(-x)/x)^4.
a(n) = Sum_{j=0..n} 4 * (n-j+4)^(n-j-1) * C(n,j).
Hyperbinomial transform of A089464.
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MAPLE
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a:= n-> add(4*(n-j+4)^(n-j-1)*binomial(n, j), j=0..n):
seq (a(n), n=0..20);
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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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