|
| |
|
|
A107668
|
|
Column 0 of triangle A107667.
|
|
3
| |
|
|
1, 4, 45, 816, 20225, 632700, 23836540, 1048592640, 52696514169, 2976295383100, 186548057815801, 12845016620629488, 963644465255618276, 78224633235142116240, 6830914919397129328500, 638477522900795994967040
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| Shift right of column 1 of triangle A107670, which is the matrix square of triangle A107667.
|
|
|
FORMULA
| a(n) = (n+1)^2*A107669(n).
|
|
|
PROG
| (PARI) {a(n)=local(A); if(n==0, n+1, A=(n+1)*x+x*O(x^n); for(k=0, n, A+=polcoeff(A, k)*x^k*(n+1-prod(i=0, k, 1+(i-n-1)*x))); polcoeff(A, n))}
|
|
|
CROSSREFS
| Cf. A107667, A107669, A107670.
Sequence in context: A039657 A114473 A126747 * A197989 A174484 A158887
Adjacent sequences: A107665 A107666 A107667 * A107669 A107670 A107671
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Jun 07 2005
|
| |
|
|
