1,4

Table of n, a(n) for n=1..73.

For n=7: A002858(7) = 11 = 3+8 = (1+2)+(2+6) = (1+2)+(2+(2+4)) = (1+2)+(2+(2+(1+3))) = (1+2)+(2+(2+(1+(1+2)))). Number of 1's in (1+2)+(2+(2+(1+(1+2)))) is 3, so a(7) = 3.

Cf. A002858.

Sequence in context: A032739 A240868 A029149 * A163001 A239913 A323701

Adjacent sequences: A080567 A080568 A080569 * A080571 A080572 A080573

easy,nonn

Naohiro Nomoto, Feb 22 2003

approved