2,2

T. D. Noe, Table of n, a(n) for n = 2..10000

Table[PrimeOmega[n^2 - 1], {n, 100}] (* Vladimir Joseph Stephan Orlovsky, Jul 22 2011 *)

(PARI) a(n)=bigomega(n^2-1) \\ Charles R Greathouse IV, Jul 30 2011

Cf. A046051, A054992, A054990, A054991, A082863.

Sequence in context: A057038 A175798 A294111 * A256918 A099871 A157220

Adjacent sequences: A193292 A193293 A193294 * A193296 A193297 A193298

nonn

Vladimir Joseph Stephan Orlovsky, Jul 22 2011

approved