OFFSET
0,2
LINKS
Eric Weisstein's World of Mathematics, Legendre Polynomial.
Wikipedia, Legendre polynomials.
FORMULA
a(n) ~ 2^(4*n) * n^(n - 1/2) / sqrt(Pi).
MATHEMATICA
Table[4^n*LegendreP[n, 2*n], {n, 0, 16}]
PROG
(PARI) a(n) = 4^n*pollegendre(n, 2*n); \\ Michel Marcus, Nov 08 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Vaclav Kotesovec, Nov 08 2021
STATUS
approved