A145620 Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=6.

1, 2, 5, 140, 35, 770, 5005, 40040, 510510, 646646, 323323, 29745716, 14300825, 12257850, 59246275, 29386152400, 7346538100, 77138650050, 475688341975, 24735793782700, 253541886272675, 21804602219450050, 10902301109725025

Offset: 1

Author

Artur Jasinski, Oct 14 2008

Keywords

• frac
• nonn

Comments

For numerators see A145619. For general properties of A_l(x) see A145609.

Crossrefs

Cf. A145609 - A145640.

Programs

Mathematica

m = 6; aa = {}; Do[k = 0; Do[k = k + m^(2 r + 1 - d)/d, {d, 1, 2 r}]; AppendTo[aa, Denominator[k]], {r, 1, 30}]; aa (*Artur Jasinski*)

Extensions

Edited by R. J. Mathar, Aug 21 2009