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A076824 Let a(1)=a(2)=1, a(n)=(2^ceiling(a(n-1)/2)+1)/a(n-2). 0
1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3, 1, 1, 3, 5, 3 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

Table of n, a(n) for n=1..105.

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

FORMULA

5-periodic with period (1, 1, 3, 5, 3)

a(n)=1/50*{33*(n mod 5)+33*[(n+1) mod 5]-7*[(n+2) mod 5]-7*[(n+3) mod 5]+13*[(n+4) mod 5]} with n>=0 - Paolo P. Lava, Nov 27 2006

MATHEMATICA

LinearRecurrence[{0, 0, 0, 0, 1}, {1, 1, 3, 5, 3}, 105] (* Ray Chandler, Aug 25 2015 *)

CROSSREFS

Cf. A076839.

Sequence in context: A010615 A114865 A096196 * A103728 A243533 A239730

Adjacent sequences:  A076821 A076822 A076823 * A076825 A076826 A076827

KEYWORD

nonn

AUTHOR

Benoit Cloitre, Nov 24 2002

STATUS

approved

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Last modified October 21 05:28 EDT 2021. Contains 348141 sequences. (Running on oeis4.)