|
Search: id:A106517
|
|
|
| A106517 |
|
Convolution of Fib(n-1) and 3^n. |
|
+0
3
|
|
| 1, 3, 10, 31, 95, 288, 869, 2615, 7858, 23595, 70819, 212512, 637625, 1913019, 5739290, 17218247, 51655351, 154967040, 464902717, 1394710735, 4184136386, 12552415923, 37657258715, 112971793856, 338915410225, 1016746277043
(list; graph; listen)
|
|
|
OFFSET
|
0,2
|
|
|
COMMENT
|
a(n) = A101220(2,3,n+1). - Ross La Haye (rlahaye(AT)new.rr.com), Jul 25 2005
|
|
FORMULA
|
G.f.: (1-x)/((1-x-x^2)(1-3x)); a(n)=sum{k=0..n, Fib(n-k-1)3^k}.
a(n) = A101220(3,3,n+1) - A101220(3,3,n). - Ross La Haye (rlahaye(AT)new.rr.com), May 31 2006
|
|
CROSSREFS
|
Diagonal sums of number triangle A106516.
Sequence in context: A004663 A136853 A033121 this_sequence A055217 A097472 A068094
Adjacent sequences: A106514 A106515 A106516 this_sequence A106518 A106519 A106520
|
|
KEYWORD
|
easy,nonn
|
|
AUTHOR
|
Paul Barry (pbarry(AT)wit.ie), May 05 2005
|
|
|
Search completed in 0.004 seconds
|
