1,1

Semiprime analogue of A076656 a(1) = 2; a(n) is smallest prime > 3*a(n-1). a(n)-a(n-1) is often 1, never more than 16 through n = 28, then jumps to 32 for n = 29; and I wonder what its value or mean value is asymptotically as a function of n.

Cf. A001358, A055496, A076656.

Adjacent sequences: A117913 A117914 A117915 this_sequence A117917 A117918 A117919

Sequence in context: A005775 A094688 A068092 this_sequence A054449 A029868 A030267

easy,nonn,less

Jonathan Vos Post (jvospost2(AT)yahoo.com), May 04 2006