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A094966 Left-hand neighbors of Fibonacci numbers in Stern's diatomic series. 3
0, 1, 1, 3, 3, 8, 8, 21, 21, 55, 55, 144, 144, 377, 377, 987, 987, 2584, 2584, 6765, 6765, 17711, 17711, 46368, 46368, 121393, 121393, 317811, 317811, 832040, 832040, 2178309, 2178309, 5702887, 5702887, 14930352, 14930352, 39088169, 39088169 (list; graph; refs; listen; history; internal format)
OFFSET

0,4

COMMENTS

Fib(2n) repeated. a(n) is the left neighbor of Fib(n+2) in A002487 and A049456. A000045(n+2)=a(n)+A094967(n).

FORMULA

G.f. : x(1+x)/(1-3x^2+x^4); a(n)=Fib(n)(1+(-1)^n)/2+fib(n+1)(1-(-1)^n)/2.

CROSSREFS

Cf. A001906.

Sequence in context: A138135 A113166 A126872 * A095068 A021299 A141678

Adjacent sequences:  A094963 A094964 A094965 * A094967 A094968 A094969

KEYWORD

easy,nonn

AUTHOR

Paul Barry (pbarry(AT)wit.ie), May 26 2004

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Last modified February 14 09:57 EST 2012. Contains 205614 sequences.