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A083578 (6^n+(-4)^n)/2. 0
1, 1, 26, 76, 776, 3376, 25376, 131776, 872576, 4907776, 30757376, 179301376, 1096779776, 6496792576, 39316299776, 234555621376, 1412702437376, 8454739787776, 50814338072576, 304542431051776, 1828628975845376 (list; graph; refs; listen; history; internal format)
OFFSET

0,3

FORMULA

a(n)=(6^n+(-4)^n)/2 G.f. (1-x)/((1+4x)(1-6x)) E.g.f. (exp(6x)+exp(-4x))/2

CROSSREFS

Cf. A083579.

Sequence in context: A139698 A124719 A126380 * A173307 A042326 A042328

Adjacent sequences:  A083575 A083576 A083577 * A083579 A083580 A083581

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), Apr 30 2003

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Last modified February 16 01:31 EST 2012. Contains 205860 sequences.