0,1

This sequence has been checked up to a(108) = 106838266736 without reaching 42. It seems to be slowly climbing in value in both the negative and positive directions. Its period is either extremely large or more probably infinite.

Chayim Lowen, Table of n, a(n) for n = 0..54

a(n+1) = A073846(a(n)).

a(n-1) = A073898(a(n)).

a(1) = A073846(a(0)) = A073846(42) = 73.

Cf. A073846, A073898, A261314, A262149.

Sequence in context: A330893 A305153 A340570 * A043689 A043573 A043733

Adjacent sequences: A261618 A261619 A261620 * A261622 A261623 A261624

nonn

Chayim Lowen, Sep 09 2015

approved