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A158969
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Numerator of Hermite(n, 5/6).
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1
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1, 5, 7, -145, -1103, 4925, 123895, 87575, -15172895, -88475275, 2015632615, 26003712575, -269076694895, -6962185390675, 28153019652055, 1895235816710375, 1874863777497025, -536453596325102875, -3255976297539604025, 157531083721635311375, 1901199312366721133425
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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) = 3^n * Hermite(n, 5/6).
E.g.f.: exp(5*x - 9*x^2).
a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(5/3)^(n-2*k)/(k!*(n-2*k)!)). (End)
D-finite with recurrence a(n) -5*a(n-1) +18*(n-1)*a(n-2)=0. - [DLMF] Georg Fischer, Feb 06 2021
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MATHEMATICA
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Table[3^n*HermiteH[n, 5/6], {n, 0, 30}] (* G. C. Greubel, Jul 14 2018 *)
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PROG
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(PARI) x='x+O('x^30); Vec(serlaplace(exp(5*x - 9*x^2))) \\ G. C. Greubel, Jul 14 2018
(Magma) [Numerator((&+[(-1)^k*Factorial(n)*(5/3)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // G. C. Greubel, Jul 14 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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