Logo

Greetings from The On-Line Encyclopedia of Integer Sequences!

Hints

Search: id:A015570
Displaying 1-1 of 1 results found. page 1
     Format: long | short | internal | text      Sort: relevance | references | number      Highlight: on | off
A015570 Linear 2nd order recurrence. +0
1
0, 1, 7, 60, 497, 4139, 34440, 286609, 2385103, 19848420, 165175073, 1374558131, 11438832720, 95191968481, 792170939287, 6592308228300, 54860037930257, 456535656023099, 3799210009394520, 31616362282015729 (list; graph; listen)
OFFSET

0,3

FORMULA

a(n) = 7 a(n-1) + 11 a(n-2).

a(n)=(1/93)*[7/2+(1/2)*sqrt(93)]^n*sqrt(93)-(1/93)*[7/2-(1/2)*sqrt(93)]^n*sqrt(93), with n>=0 - Paolo P. Lava (ppl(AT)spl.at), Jun 25 2008

G.f.:1/(1-7*x-11*x^2) . [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Dec 20 2008]

PROGRAM

(Other) sage: [lucas_number1(n, 7, -11) for n in xrange(0, 20)]# [From Zerinvary Lajos (zerinvarylajos(AT)yahoo.com), Apr 24 2009]

CROSSREFS

Sequence in context: A077409 A099347 A063969 this_sequence A024090 A156545 A157871

Adjacent sequences: A015567 A015568 A015569 this_sequence A015571 A015572 A015573

KEYWORD

nonn,easy

AUTHOR

Olivier Gerard (olivier.gerard(AT)gmail.com)

page 1

Search completed in 0.002 seconds

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


AT&T Labs Research