A105187 a(n) = determinant of the n X n matrix m(i,j) = (i+j+2)!/i!/j!.

1, 24, 720, 28800, 1512000, 101606400, 8534937600, 877879296000, 108637562880000, 15933509222400000, 2734190182563840000, 542861032610856960000, 123500884918969958400000, 31920228717518389248000000, 9302466654819644866560000000, 3036325116133132084445184000000

Offset

0,2

Links

Table of n, a(n) for n=0..15.

Formula

a(n) = (1/12)*(n+1)*(n+2)!*(n+3)!.

Prog

(PARI) a(n)=(1/12)*(n+1)*(n+2)!*(n+3)!

Crossrefs

Cf. A001286.

Sequence in context: A246192 A246612 A289635 * A062313 A239815 A279659

Adjacent sequences: A105184 A105185 A105186 * A105188 A105189 A105190

Keyword

nonn

Author

Benoit Cloitre, Apr 11 2005

Status

approved