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A349069
a(n) = H(n, 3*n), where H(n,x) is n-th Hermite polynomial.
3
1, 6, 142, 5724, 324876, 23761800, 2126627016, 225081383184, 27498818692752, 3808595968290144, 589662462800129760, 100917872425324633536, 18918488805502510634688, 3855242696428245589623936, 848531650317994634533024896, 200604383862593153678170272000
OFFSET
0,2
COMMENTS
In general, for k>=1, H(n,k*n) ~ exp(-1/(4*k^2)) * (2*k)^n * n^n.
LINKS
Eric Weisstein's World of Mathematics, Hermite Polynomial.
Wikipedia, Hermite polynomial.
FORMULA
a(n) ~ exp(-1/36) * 6^n * n^n.
MAPLE
a:= n-> simplify(HermiteH(n, 3*n)):
seq(a(n), n=0..20); # Alois P. Heinz, Nov 07 2021
MATHEMATICA
Table[HermiteH[n, 3*n], {n, 0, 20}]
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Nov 07 2021
STATUS
approved