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A145626
Denominator of the polynomial A_l(x) = sum_{d=1..l-1} x^(l-d)/d for index l=2n+1 evaluated at x=9.
1
2, 4, 20, 280, 280, 3080, 40040, 16016, 272272, 25865840, 25865840, 594914320, 2974571600, 2974571600, 86262576400, 5348279736800, 5348279736800, 5348279736800, 10415071066400, 10415071066400, 427017913722400
OFFSET
1,1
COMMENTS
For numerators see A145625. For general properties of A_l(x) see A145609.
MATHEMATICA
m = 9; 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*)
CROSSREFS
Sequence in context: A059831 A064493 A145614 * A228808 A059588 A132498
KEYWORD
frac,nonn
AUTHOR
Artur Jasinski, Oct 14 2008
EXTENSIONS
Edited by R. J. Mathar, Aug 21 2009
STATUS
approved