1,3

Table of n, a(n) for n=1..81.

Cf. A007514.

Sequence in context: A240491 A113750 A004565 * A068450 A071436 A214741

Adjacent sequences: A068446 A068447 A068448 * A068450 A068451 A068452

cons,easy,nonn

Benoit Cloitre, Mar 10 2002

approved