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A076785
Let u(1)=u(2)=u(3)=1, u(n)=(2^floor(u(n-1)/2)+2^floor(u(n-2)/2)+1)/u(n-3) then a(n) = denominator of u(n).
1
1, 1, 1, 1, 1, 1, 3, 4, 1, 13, 13, 1, 3, 12, 3, 1, 13, 13, 1, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4, 1, 13, 13, 1, 3, 12, 3, 1, 13, 13, 1, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4, 1, 13, 13, 1, 3, 12, 3, 1, 13, 13, 1, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 4, 1, 13, 13, 1, 3, 12, 3, 1, 13, 13, 1, 4, 3, 1
OFFSET
1,7
COMMENTS
Sequence is 24-periodic
FORMULA
Period is (1, 1, 1, 1, 1, 1, 3, 4, 1, 13, 13, 1, 3, 12, 3, 1, 13, 13, 1, 4, 3, 1, 1, 1)
CROSSREFS
Cf. A076784.
Sequence in context: A325174 A109956 A123319 * A110506 A114189 A200659
KEYWORD
frac,nonn
AUTHOR
Benoit Cloitre, Nov 24 2002
STATUS
approved