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A068113 Numerator of coefficient of (-x^2)^n in F(x)*F(-x) where F(x)=sum(k>=0,x^k/(k!)^3). +0
2
1, 3, 5, 7, 11, 143, 221, 323, 7429, 437, 667, 20677, 899, 33263, 1363783, 2022161, 3065857, 3065857, 162490421, 4391633, 259106347, 385499687, 8965109, 600662303, 907383479, 66238993967, 66238993967, 98733594781, 8194888366823 (list; graph; listen)
OFFSET

0,2

REFERENCES

Bruce Berndt, Ramanujan's Notebooks Part II, Springer-Verlag; see Hypergeometric series, p. 62.

FORMULA

F(x)*F(-x)=sum(n>=0, (3n)!/(n!)^3/((2n)!)^3*(-x^2)^n)

CROSSREFS

Cf. A068112.

Sequence in context: A083840 A088051 A159471 this_sequence A068831 A109862 A069804

Adjacent sequences: A068110 A068111 A068112 this_sequence A068114 A068115 A068116

KEYWORD

easy,frac,nonn

AUTHOR

Benoit Cloitre (benoit7848c(AT)orange.fr), Mar 21 2002

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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