

A076784


Let u(1)=u(2)=u(3)=1, u(n)=(2^floor(u(n1)/2)+2^floor(u(n2)/2)+1)/u(n3) then a(n) = numerator of u(n).


1



1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3, 1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13
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OFFSET

1,4


COMMENTS

Sequence is 24periodic


LINKS

Table of n, a(n) for n=1..85.


FORMULA

Period is (1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3)


MATHEMATICA

PadRight[{}, 120, {1, 1, 1, 3, 4, 7, 13, 13, 1, 12, 12, 3, 13, 91, 13, 3, 12, 12, 1, 13, 13, 7, 4, 3}] (* Harvey P. Dale, May 27 2018 *)


CROSSREFS

Cf. A076785.
Sequence in context: A231337 A049930 A102938 * A279815 A088764 A093124
Adjacent sequences: A076781 A076782 A076783 * A076785 A076786 A076787


KEYWORD

frac,nonn


AUTHOR

Benoit Cloitre, Nov 24 2002


STATUS

approved



