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A117647 a(2n) = A014445(n), a(2n+1) = A015448(n+1). 1
0, 1, 2, 5, 8, 21, 34, 89, 144, 377, 610, 1597, 2584, 6765, 10946, 28657, 46368, 121393, 196418, 514229, 832040, 2178309, 3524578, 9227465, 14930352, 39088169, 63245986, 165580141, 267914296, 701408733 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

COMMENTS

a(n+1) = A059973(n+1) - A059973(n).

LINKS

Table of n, a(n) for n=0..29.

Index entries for linear recurrences with constant coefficients, signature (0,4,0,1).

FORMULA

G.f. -x*(x+1)^2/(x^4+4*x^2-1)

CROSSREFS

Cf. A000045, A033887, A014445, A015448, A059973.

Sequence in context: A087077 A200276 A168081 * A121568 A276464 A001005

Adjacent sequences:  A117644 A117645 A117646 * A117648 A117649 A117650

KEYWORD

easy,nonn

AUTHOR

Creighton Dement, Apr 10 2006

STATUS

approved

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Last modified February 21 06:36 EST 2018. Contains 299390 sequences. (Running on oeis4.)