|
| |
|
|
A124529
|
|
a(n) = Sum_{k=0..n} k!*A124526(n+k,k) for n>=0.
|
|
3
| |
|
|
1, 2, 6, 29, 190, 1562, 15457, 179034, 2377092, 35599701, 593731310, 10914169312, 219252994039, 4779086510108, 112341582757512, 2833025331800643, 76293601822430388, 2185288262904326236, 66338823231846583471
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
COMMENTS
| Equals diagonal sums of triangle A124418: a(n) = Sum_{k=0..n} A124418(n+k,k) for n>=0 (conjecture).
|
|
|
PROG
| (PARI) {a(n)=sum(k=0, n, k!*((n+k)\2)!*((n+k+1)\2)!*polcoeff(polcoeff(exp((1+y)*(exp(x+x*O(x^n))-1)), (n+k)\2), k) *polcoeff(polcoeff(exp((1+y)*(exp(x+x*O(x^n))-1)), (n+k+1)\2), k))}
|
|
|
CROSSREFS
| Cf. A124526, A124527, A124528; A124418.
Sequence in context: A027109 A107375 A020126 * A187006 A088957 A030538
Adjacent sequences: A124526 A124527 A124528 * A124530 A124531 A124532
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| Paul D. Hanna (pauldhanna(AT)juno.com), Nov 08 2006
|
| |
|
|
