A101613 - OEIS

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A101613

(2n)! * Sum[k=n..2n, 1/k].

3, 26, 684, 35664, 3068640, 392722560, 69878833920, 16484477184000, 4976250951168000, 1870345490614272000, 856314330237628416000, 469109144339151224832000, 302956190548293037916160000

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

LINKS

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

CROSSREFS

Cf. A101609, A101610, A101611, A101612, A000254, A046673, A052517.

Sequence in context: A129430 A005156 A355120 * A280222 A354652 A174811

Adjacent sequences: A101610 A101611 A101612 * A101614 A101615 A101616

KEYWORD

nonn,easy

AUTHOR

Ralf Stephan, Dec 10 2004

STATUS

approved