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Search: id:A015461
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A015461 q-Fibonacci numbers for q=4. +0
3
0, 1, 1, 5, 21, 341, 5717, 354901, 23771733, 5838469717, 1563742763605, 1532083548256853, 1641235215638133333, 6427665390003549698645, 27541785384957544314239573, 431380864280640133787922528853 (list; graph; listen)
OFFSET

0,4

FORMULA

a(n) = a(n-1) + 4^(n-2) a(n-2).

Associated constant: C_4=lim n-->infty a(n)*a(n-2)/a(n-1)^2 =1.094337777197221121533242886.... - Benoit Cloitre (benoit7848c(AT)orange.fr), Aug 30 2003

CROSSREFS

Cf. A015459, A015460.

Sequence in context: A027160 A119686 A141798 this_sequence A101694 A006109 A009732

Adjacent sequences: A015458 A015459 A015460 this_sequence A015462 A015463 A015464

KEYWORD

nonn,easy

AUTHOR

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

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Last modified December 15 00:47 EST 2009. Contains 170825 sequences.


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