|
| |
|
|
A035023
|
|
One ninth of 9-factorial numbers.
|
|
13
| |
|
|
1, 18, 486, 17496, 787320, 42515280, 2678462640, 192849310080, 15620794116480, 1405871470483200, 139181275577836800, 15031577762406374400, 1758694598201545804800, 221595519373394771404800
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 1,2
|
|
|
COMMENTS
| E.g.f. is G.f. for A001019(n-1) (powers of nine).
|
|
|
LINKS
| Index entries for sequences related to factorial numbers
|
|
|
FORMULA
| 9*a(n) = (9*n)(!^9) := product(9*j, j=1..n)= 9^n*n!; E.g.f. (-1+1/(1-9*x))/9.
|
|
|
MATHEMATICA
| s=1; lst={s}; Do[s+=n*s; AppendTo[lst, s], {n, 17, 3*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: A084273 A027405 A116176 * A180791 A126276 A035277
Adjacent sequences: A035020 A035021 A035022 * A035024 A035025 A035026
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Wolfdieter Lang (wolfdieter.lang(AT)physik.uni-karlsruhe.de)
|
| |
|
|
