A101632 Denominator of partial sums of a certain series.

1, 33, 924, 17556, 1141140, 1025884860, 17440042620, 715041747420, 16445960190660, 115121721334620, 345365164003860, 1242969225249892140, 382452069307659120, 27154096920843797520, 1004701586071220508240

Offset

1,2

Comments

The numerators are given in A101631.

Links

Table of n, a(n) for n=1..15.

Formula

a(n)=denominator(s(n)) with s(n)=24*sum(1/((5*k-1)*k*(5*k+1)), k=1..n).

Mathematica

Denominator[24*Accumulate[Table[1/((5k-1)k(5k+1)), {k, 15}]]] (* Harvey P. Dale, May 29 2014 *)

Crossrefs

Sequence in context: A014931 A197358 A299074 * A159675 A162837 A324951

Adjacent sequences: A101629 A101630 A101631 * A101633 A101634 A101635

Keyword

nonn,frac,easy

Author

Wolfdieter Lang, Dec 23 2004

Status

approved