A076742 Let u(1)=u(2)=1, u(n)=(2^floor(u(n-1)/2)+1)/u(n-2) then a(n) = numerator of u(n).

1, 1, 2, 3, 3, 2, 4, 3, 9, 1, 8, 2, 27, 3, 16, 4, 27, 9, 8, 8, 9, 27, 4, 16, 3, 27, 2, 8, 1, 9, 3, 4, 2, 3, 3, 2, 1, 1, 2, 3, 3, 2, 4, 3, 9, 1, 8, 2, 27, 3, 16, 4, 27, 9, 8, 8, 9, 27, 4, 16, 3, 27, 2, 8, 1, 9, 3, 4, 2, 3, 3, 2, 1, 1, 2, 3, 3, 2, 4, 3, 9, 1, 8, 2, 27, 3, 16, 4, 27, 9, 8, 8, 9, 27, 4, 16

Offset

1,3

Comments

Sequence is 36-periodic

Links

Table of n, a(n) for n=1..96.

Formula

Period is (1, 1, 2, 3, 3, 2, 4, 3, 9, 1, 8, 2, 27, 3, 16, 4, 27, 9, 8, 8, 9, 27, 4, 16, 3, 27, 2, 8, 1, 9, 3, 4, 2, 3, 3, 2)

Crossrefs

Cf. A076780.

Sequence in context: A139169 A386458 A238444 * A373345 A376698 A308284

Adjacent sequences: A076739 A076740 A076741 * A076743 A076744 A076745

Keyword

frac,nonn

Author

Benoit Cloitre, Nov 24 2002

Status

approved