A114859 Numerator/Pi^n of coefficient of z^(2n) in log(InverseErf(z)).

1, 1, 193, 143, 27319, 7103567, 797653, 686720159, 2371559272031, 95739689923, 1395350636248391, 63900308633475133, 529306891755787837, 12737935334233822633, 3609754387565898974963447737

Offset

1,3

Links

G. C. Greubel, Table of n, a(n) for n = 1..260

Example

(Pi*z^2)/12 + (Pi^2*z^4)/90 + (193*Pi^3*z^6)/90720 + log(sqrt(Pi)/2) + log(z) + ...

Mathematica

Numerator[CoefficientList[Series[Log[InverseErf[x/Pi]] , {x, 0, 50}] , x]][[;; ;; 2]] (* G. C. Greubel, Mar 19 2017 *)

Crossrefs

Cf. A114860.

Sequence in context: A300848 A340352 A012856 * A298728 A332457 A088119

Adjacent sequences: A114856 A114857 A114858 * A114860 A114861 A114862

Keyword

nonn,frac

Author

Eric W. Weisstein, Jan 02 2006

Status

approved