A103980 Reduced denominators of x^(2n) in the series expansion of erf(x)^2 Pi/4 about 0.

1, 1, 3, 45, 35, 4725, 31185, 945945, 289575, 310134825, 3273645375, 50414138775, 5749711695, 102776096548125, 1494206326738125, 92854250304440625, 191898783962510625, 107655217802968460625

Offset

0,3

Links

Table of n, a(n) for n=0..17.

Eric Weisstein's World of Mathematics, Erf

Example

x^2 - (2*x^4)/3 + (14*x^6)/45 - (4*x^8)/35 + (166*x^10)/4725 + ...

Crossrefs

Cf. A103979.

Sequence in context: A307007 A142600 A212999 * A101236 A119182 A178337

Adjacent sequences: A103977 A103978 A103979 * A103981 A103982 A103983

Keyword

nonn,frac

Author

Eric W. Weisstein, Feb 23 2005

Status

approved