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A160311
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Numerator of Hermite(n, 13/31).
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1
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1, 26, -1246, -132340, 3743596, 1114763416, -6992108744, -13037246540656, -244896579015280, 194093391754729376, 9282649209429277216, -3489126110080737399104, -286971048447852951277376, 73011957343257950639722880, 9068569507442760557249311616
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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) = 31^n * Hermite(n, 13/31).
a(n+2) = 26*a(n+1) - 1922*(n+1)*a(n)
E.g.f.: exp(26*x - 961*x^2).
a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(26/31)^(n-2*k)/(k!*(n-2*k)!)). (End)
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EXAMPLE
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Numerators of 1, 26/31, -1246/961, -132340/29791, 3743596/923521, ...
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MATHEMATICA
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Numerator[HermiteH[Range[0, 20], 13/31]] (* Harvey P. Dale, Jan 10 2015 *)
Table[31^n*HermiteH[n, 13/31], {n, 0, 30}] (* G. C. Greubel, Oct 04 2018 *)
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PROG
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(PARI) x='x+O('x^30); Vec(serlaplace(exp(26*x - 961*x^2))) \\ G. C. Greubel, Oct 04 2018
(Magma) [Numerator((&+[(-1)^k*Factorial(n)*(26/31)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // G. C. Greubel, Oct 04 2018
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CROSSREFS
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KEYWORD
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sign,frac
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AUTHOR
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STATUS
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approved
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