|
| |
|
|
A016260
|
|
Expansion of 1/((1-x)(1-8x)(1-12x)).
|
|
0
| |
|
|
1, 21, 325, 4485, 58501, 739461, 9173125, 112474245, 1368864901, 16579770501, 200184379525, 2412029622405, 29022892013701, 348902996523141, 4191862297147525, 50342558276728965, 604432385008416901
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,2
|
|
|
LINKS
| Index to sequences with linear recurrences with constant coefficients, signature (21,-16,96).
|
|
|
FORMULA
| a(n) = (21*12^(n+1)-22*8^(n+1)+1)/77 - Bruno Berselli, Mar 21 2011
a(n)=20*a(n-1)-96*a(n-2)+1, n>=2. - Vincenzo Librandi, Mar 21 2011
|
|
|
MAPLE
| a:=n->sum((12^(n-j)-8^(n-j))/4, j=0..n): seq(a(n), n=1..17); - Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Jan 12 2007
|
|
|
CROSSREFS
| Sequence in context: A016262 A001233 A145148 * A011810 A091947 A016195
Adjacent sequences: A016257 A016258 A016259 * A016261 A016262 A016263
|
|
|
KEYWORD
| nonn
|
|
|
AUTHOR
| N. J. A. Sloane (njas(AT)research.att.com).
|
| |
|
|
