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A015473 q-Fibonacci numbers for q=2. 1
0, 1, 2, 9, 74, 1193, 38250, 2449193, 313534954, 80267397417, 41097221012458, 42083634584154409, 86187324725569242090, 353023324159566199755049, 2891967157702491033962603498, 47381990264820937260009495466281 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

COMMENTS

a(1) = 1, a(n+1) = denominator of continued fraction [1;2,4,8,...,2^n]. - Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 02 2001

FORMULA

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

CROSSREFS

Cf. A061377.

Sequence in context: A132843 A084873 A103996 * A029849 A197082 A080638

Adjacent sequences:  A015470 A015471 A015472 * A015474 A015475 A015476

KEYWORD

nonn,easy

AUTHOR

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

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Last modified February 14 20:38 EST 2012. Contains 205663 sequences.