A119574 a(n) = binomial(2*n,n)*(n+2)^2/(n+1).

4, 9, 32, 125, 504, 2058, 8448, 34749, 143000, 588302, 2418624, 9934834, 40770352, 167152500, 684656640, 2801810205, 11455885080, 46801769190, 191055480000, 779363066790, 3177034283280, 12942655253580, 52693956656640

Offset

0,1

Links

Table of n, a(n) for n=0..22.

Maple

[seq (binomial(2*n, n)*(n+2)^2/(n+1), n=0..25)];

Crossrefs

Cf. A000984.

Sequence in context: A219151 A057819 A129196 * A006393 A320920 A368683

Adjacent sequences: A119571 A119572 A119573 * A119575 A119576 A119577

Keyword

easy,nonn

Author

Zerinvary Lajos, May 31 2006

Status

approved