|
Search: id:A135030
|
|
|
| A135030 |
|
Generalized Fibonacci numbers: a(n) = 6*a(n-1) + 2*a(n-2). |
|
+0
1
|
|
| 0, 1, 6, 38, 240, 1516, 9576, 60488, 382080, 2413456, 15244896, 96296288, 608267520, 3842197696, 24269721216, 153302722688, 968355778560, 6116740116736, 38637152257536, 244056393778688, 1541612667187200
(list; graph; listen)
|
|
|
OFFSET
|
0,3
|
|
|
LINKS
|
Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Feb 23 2008, Table of n, a(n) for n = 0..51
|
|
FORMULA
|
a(0) = 0; a(1) = 1; a(n) = 2*(3*a(n-1) + a(n-2)). a(n) = 1/(2*sqrt(11))*((3+sqrt(11))^n - (3-sqrt(11))^n).
|
|
CROSSREFS
|
Adjacent sequences: A135027 A135028 A135029 this_sequence A135031 A135032 A135033
Sequence in context: A026296 A037499 A037676 this_sequence A147957 A098410 A079949
|
|
KEYWORD
|
nonn
|
|
AUTHOR
|
Rolf Pleisch (r_pleisch(AT)gmx.ch), Feb 10 2008, Feb 14 2008
|
|
EXTENSIONS
|
More terms from Joshua Zucker (joshua.zucker(AT)stanfordalumni.org), Feb 23 2008
|
|
|
Search completed in 0.002 seconds
|
