A203775 Square root of v(2*n+1) / (2*v(2*n)), where v=A203773.

1, 20, 1170, 136000, 26276900, 7605187200, 3079172005000, 1661435709440000, 1152219238256970000, 998612074565747200000, 1057635292751424744500000, 1344007509419503558656000000, 2018255243962112126438545000000

Offset

1,2

Comments

See A203773.

Links

Table of n, a(n) for n=1..13.

Formula

a(n) = n*gamma((1-i)*n)*gamma((1+i)*n)*sinh(n*Pi)/Pi (conjecture). - Velin Yanev, Nov 14 2016

Mathematica

(See A203773.)

Crossrefs

Sequence in context: A265654 A152130 A151625 * A184269 A042745 A363054

Adjacent sequences: A203772 A203773 A203774 * A203776 A203777 A203778

Keyword

nonn

Author

Clark Kimberling, Jan 05 2012

Status

approved