1,1

Table of n, a(n) for n=1..68.

Lukasz Merta, Composition inverses of the variations of the Baum-Sweet sequence, arXiv:1803.00292 [math.NT], 2018. See h(n) p. 23.

(PARI) bs(n)=if(n<3, n<2, if(n%2, bs(n\2), n%4==0&&bs(n/4))); \\ A086747

isok(n) = bs(n) == 0;

Complement of A060142. Cf. A086747.

Sequence in context: A154329 A176590 A253061 * A087943 A034020 A187476

Adjacent sequences: A320727 A320728 A320729 * A320731 A320732 A320733

nonn

Michel Marcus, Oct 20 2018

approved