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A183229 G.f.: Sum_{n>=0} a(n)*x^n/n!^2 = Product_{n>=1} (1 + x^n/n!^2). 4
1, 1, 1, 10, 17, 126, 3862, 12741, 110609, 1929430, 167593826, 845443941, 11064102326, 178820437901, 7538334414717, 1483432379403435, 10962589471724049, 189591619730952006, 3827839859607324106 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,4
LINKS
EXAMPLE
G.f.: A(x) = 1 + x + x^2/2!^2 + 10*x^3/3!^2 + 17*x^4/4!^2 +...
A(x) = (1 + x)*(1 + x^2/2!^2)*(1 + x^3/3!^2)*(1 + x^4/4!^2)*...
PROG
(PARI) {a(n)=n!^2*polcoeff(prod(k=1, n, 1+x^k/k!^2 +x*O(x^n)), n)}
CROSSREFS
Sequence in context: A043939 A351498 A058621 * A219879 A177185 A241281
KEYWORD
nonn
AUTHOR
Paul D. Hanna, Jan 04 2011
STATUS
approved

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Last modified July 15 21:59 EDT 2024. Contains 374334 sequences. (Running on oeis4.)