|
| |
|
|
A015611
|
|
a(n) = 12 a(n-1) + 7 a(n-2).
|
|
2
| |
|
|
0, 1, 12, 151, 1896, 23809, 298980, 3754423, 47145936, 592032193, 7434407868, 93357119767, 1172326292280, 14721415345729, 184863268194708, 2321409125756599, 29150952386442144, 366061292517601921
(list; graph; refs; listen; history; internal format)
|
|
|
|
OFFSET
| 0,3
|
|
|
FORMULA
| a(n)=(1/86)*sqrt(43)*{[6+sqrt(43)]^n-[6-sqrt(43)]^n}, with n>=0 [From Paolo P. Lava (paoloplava(AT)gmail.com), Jan 13 2009]
|
|
|
MATHEMATICA
| Join[{a=0, b=1}, Table[c=12*b+7*a; a=b; b=c, {n, 60}]] (*From Vladimir Joseph Stephan Orlovsky, Jan 31 2011*)
|
|
|
PROG
| (Other) sage: [lucas_number1(n, 12, -7) for n in xrange(0, 18)]# [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 29 2009]
|
|
|
CROSSREFS
| Sequence in context: A053507 A060917 A113358 * A127650 A189548 A103759
Adjacent sequences: A015608 A015609 A015610 * A015612 A015613 A015614
|
|
|
KEYWORD
| nonn,easy
|
|
|
AUTHOR
| Olivier Gerard (olivier.gerard(AT)gmail.com)
|
| |
|
|
