|
| |
|
|
A074564
|
|
4^n + 5^n + 9^n.
|
|
1
| |
|
|
3, 18, 122, 918, 7442, 63198, 551162, 4877478, 43502882, 389635758, 3497598602, 31434082038, 282690454322, 2543153640318, 22883164406042, 205922723414598, 1853177071709762, 16677961818988878, 150098518713741482
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,1
|
|
|
LINKS
| Vincenzo Librandi, Table of n, a(n) for n = 0..1000
|
|
|
FORMULA
| G.f.: 1/(1-4*x)+1/(1-5*x)+1/(1-9*x). E.g.f.: exp(4*x)+exp(5*x)+exp(9*x). [From Mohammad K. Azarian, Dec 30 2008]
|
|
|
MATHEMATICA
| Table[4^n + 5^n + 9^n, {n, 0, 20}]
|
|
|
PROG
| (MAGMA) [4^n + 5^n + 9^n: n in [0..20]]; // Vincenzo Librandi, Aug 25 2011
|
|
|
CROSSREFS
| Cf. A001550, A001576, A034513, A001579, A074501 - A074580.
Sequence in context: A183145 A127188 A074558 * A108241 A199421 A176277
Adjacent sequences: A074561 A074562 A074563 * A074565 A074566 A074567
|
|
|
KEYWORD
| easy,nonn
|
|
|
AUTHOR
| Robert G. Wilson v (rgwv(AT)rgwv.com), Aug 23 2002
|
| |
|
|
