|
| |
|
|
A035018
|
|
One fifth of 9-factorial numbers.
|
|
12
| |
|
|
1, 14, 322, 10304, 422464, 21123200, 1246268800, 84746278400, 6525463436800, 561189855564800, 53313036278656000, 5544555772980224000, 626534802346765312000, 76437245886305368064000
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
LINKS
| Index entries for sequences related to factorial numbers
|
|
|
FORMULA
| 5*a(n) = (9*n-4)(!^9) := product(9*j-4, j=1..n); E.g.f. (-1+(1-9*x)^(-5/9))/5.
|
|
|
MATHEMATICA
| s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 13, 2*5!, 9}]; lst [From Vladimir Orlovsky (4vladimir(AT)gmail.com), Nov 08 2008]
|
|
|
CROSSREFS
| Cf. A007559, A034171, A045756, A035012, A035013, A035017, A035018, A035020-A035023.
Sequence in context: A034834 A205619 A034912 * A133130 A090598 A060075
Adjacent sequences: A035015 A035016 A035017 * A035019 A035020 A035021
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
|
| |
|
|
