A130412 Denominator of partial sums of a series for 3*(Pi-3).

2, 5, 140, 105, 2310, 15015, 120120, 85085, 9699690, 4849845, 446185740, 557732175, 3346393050, 48522699225, 24067258815600, 1504203675975, 3008407351950, 55655536011075, 222622144044300, 2281876976454075

Offset: 1

Author

Wolfdieter Lang, Jun 01 2007, Sep 09 2008

Keywords

• nonn
• frac
• easy

Comments

Numerators are given in A130411.

Crossrefs

Cf. A130411.

Formula

a(n) = denominator(r(n)) with the rationals r(n) defined in A130411.