1,1
See A003828 for references and links.
Cf. A003828, A078518, A078519.
Sequence in context: A184668 A077640 A188347 * A019291 A205734 A205915
Adjacent sequences: A078517 A078518 A078519 * A078521 A078522 A078523
nonn
N. J. A. Sloane (njas(AT)research.att.com), Jan 07 2003