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A198478 a(n) = 9^n * n^9. 3
0, 9, 41472, 14348907, 1719926784, 115330078125, 5355700839936, 193010051319183, 5777633090469888, 150094635296999121, 3486784401000000000, 73994897046174912819, 1457274373159131021312, 26955214582765006137717 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
FORMULA
G.f.: 9*x*(1 + 4518*x + 1183248*x^2 + 64322586*x^3 + 1024762590*x^4 + 5210129466*x^5 + 7763290128*x^6 + 2401050438*x^7 + 43046721*x^8)/(1 - 9*x)^10. - Colin Barker, Apr 30 2013
a(n) = A001019(n)*A001017(n). - Michel Marcus, May 18 2022
MATHEMATICA
Table[9^n*n^9, {n, 0, 20}] (* G. C. Greubel, May 17 2022 *)
PROG
(Magma) [9^n*n^9: n in [0..20]]
(SageMath) [9^n*n^9 for n in (0..20)] # G. C. Greubel, May 17 2022
CROSSREFS
Sequence in context: A297563 A234641 A242853 * A159398 A321581 A053971
KEYWORD
nonn,easy
AUTHOR
Vincenzo Librandi, Oct 27 2011
STATUS
approved

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Last modified July 14 13:47 EDT 2024. Contains 374318 sequences. (Running on oeis4.)