1,1

When n is an odd prime a(n) = 3.

a(n)=d(n)+2+(-1)^n. - Paul Boddington (psb(AT)maths.warwick.ac.uk), Feb 02 2004

Cf. A062249, A007503, A062553.

Sequence in context: A124568 A091807 A085825 this_sequence A024871 A111202 A112486

Adjacent sequences: A037849 A037850 A037851 this_sequence A037853 A037854 A037855

nonn

Ahmed Fares (ahmedfares(AT)my-deja.com), Jul 04 2001