1,1

It is extremely probable that a(n) = 2 for all n >= 169.

Table of n, a(n) for n=1..89.

Cf. A020667.

Sequence in context: A269120 A095733 A239919 * A074205 A277054 A218770

Adjacent sequences: A020663 A020664 A020665 * A020667 A020668 A020669

nonn,base

David W. Wilson

approved