OFFSET
2,1
COMMENTS
The sequence starts at n=2 because the n=1 and n=0 terms are not quadratic in x and the denominator of 0 is undefined.
This sequence arises out of my preliminary investigation into the square-summability of the Jacobi polynomials, i.e., does Sum_{n=0}^ infinity {P^{a,b}_n(z)}^2 exist?
REFERENCES
N. N. Lebedev & Richard A. Silverman (translator), Special Functions & their Applications, Dover Publications, New York, 1972, pp. 96-97.
FORMULA
a(n) = 4*(n-1)!*n!.
MATHEMATICA
Table[4(n-1)!(n)!, {n, 2, 16}] (* for the first 14 terms *)
CROSSREFS
KEYWORD
frac,easy,nonn
AUTHOR
Graham L. Giller (graham(AT)gillerinvestments.com), Jun 16 2005
STATUS
approved