1,2

Cf. A000040.

Sequence in context: A011556 A089043 A034236 this_sequence A053420 A001802 A122590

Adjacent sequences: A058012 A058013 A058014 this_sequence A058016 A058017 A058018

nonn

Harrison Brown (nanb(AT)mindspring.com), Nov 14 2000

Two more terms from Erich Friedman (efriedma(AT)stetson.edu), Jun 15 2001