A119552 Binomial(binomial(2*n,n)*n,n).

1, 2, 66, 34220, 250654530, 26255517781752, 40219012695854521452, 915602638690858051785326904, 313119156483427472599890586326722370, 1620758891081732168210880572699959520551984700

Offset

0,2

Links

Table of n, a(n) for n=0..9.

Maple

[seq (binomial(binomial(2*n, n)*n, n), n=0..10)];

Crossrefs

Cf. A005430.

Sequence in context: A255435 A335546 A139822 * A230663 A016535 A245097

Adjacent sequences: A119549 A119550 A119551 * A119553 A119554 A119555

Keyword

easy,nonn

Author

Zerinvary Lajos, May 30 2006

Status

approved