A107394 C(n+2,2)*C(n+4,2).

6, 30, 90, 210, 420, 756, 1260, 1980, 2970, 4290

Offset

0,1

Comments

Duplicates A033487.

Links

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

Formula

a(n)=A033487(n+1). [From R. J. Mathar, Aug 24 2008]

Example

If n=0 then C(0+2,2)*C(0+4,2)= C(2,2)*C(4,2)=1*6=6
If n=4 then C(4+2,2)*C(4+4,2)= C(6,2)*C(8,2)=15*28=420

Crossrefs

Cf. A062196.

Sequence in context: A009775 A297570 A119536 * A033487 A061138 A073948

Adjacent sequences: A107391 A107392 A107393 * A107395 A107396 A107397

Keyword

dead

Author

Zerinvary Lajos, May 25 2005

Status

approved