1,1

Gica-Panaitopol semiprimes. Numbers of the form p*q where p and q are primes, not necessarily distinct, in Gica-Panaitopol recursion: g(1) = 1; g(n+1) = 2*g(n) if g(n) <= n; otherwise g(n+1) = g(n) - 1.

Table of n, a(n) for n=1..58.

A001358 INTERSECTION A193298.

Cf. A001358, A193298, A193299.

Sequence in context: A001358 A176540 A108764 * A129336 A226526 A103607

Adjacent sequences: A193798 A193799 A193800 * A193802 A193803 A193804

nonn,easy

Jonathan Vos Post, Aug 05 2011

approved