1,2

Useful for computing A000669 and A000084.

For Maple code see A000669, method 2.

Cf. A000084, A000669.

Sequence in context: A002715 A112052 A127178 this_sequence A060089 A148689 A148690

Adjacent sequences: A058754 A058755 A058756 this_sequence A058758 A058759 A058760

nonn

N. J. A. Sloane (njas(AT)research.att.com), Jan 01 2001