|
|
A159656
|
|
Numerator of Hermite(n, 18/19).
|
|
1
|
|
|
1, 36, 574, -31320, -2370804, 5103216, 8742318216, 292616324064, -33649488597360, -2901533477298624, 114199171722894816, 25060241888120278656, -4801113850900597056, -217294775817306515769600, -7777548674818481563737984, 1916423841667868925104549376
(list;
graph;
refs;
listen;
history;
text;
internal format)
|
|
|
OFFSET
|
0,2
|
|
LINKS
|
|
|
FORMULA
|
D-finite with recurrence a(n) -36*a(n-1) +722*(n-1)*a(n-2)=0. [DLMF] - R. J. Mathar, Feb 16 2014
a(n) = 19^n * Hermite(n, 18/19).
E.g.f.: exp(36*x - 361*x^2).
a(n) = numerator(Sum_{k=0..floor(n/2)} (-1)^k*n!*(36/19)^(n-2*k)/(k!*(n-2*k)!)). (End)
|
|
EXAMPLE
|
Numerator of 1, 36/19, 574/361, -31320/6859, -2370804/130321, 5103216/2476099,...
|
|
MAPLE
|
orthopoly[H](n, 18/19) ;
numer(%) ;
|
|
MATHEMATICA
|
Table[19^n*HermiteH[n, 18/19], {n, 0, 50}] (* G. C. Greubel, Jul 11 2018 *)
|
|
PROG
|
(Magma) [Numerator((&+[(-1)^k*Factorial(n)*(36/19)^(n-2*k)/( Factorial(k) *Factorial(n-2*k)): k in [0..Floor(n/2)]])): n in [0..30]]; // G. C. Greubel, Jul 11 2018
|
|
CROSSREFS
|
|
|
KEYWORD
|
sign,frac
|
|
AUTHOR
|
|
|
STATUS
|
approved
|
|
|
|