1,2

A003627 indexed by A000040.

The asymptotic density of this sequence is 1/2 (by Dirichlet's theorem). - Amiram Eldar, Feb 28 2021

Amiram Eldar, Table of n, a(n) for n = 1..10000

a(n) = k such that A000040(k) = A003627(n).

PrimePi/@Select[3Range[0, 250]-1, PrimeQ] (* Harvey P. Dale, Apr 26 2011 *)

A003627 gives primes arising in A024893, A087370, A088879.

A133677 is another version.

Sequence in context: A080207 A187347 A187413 * A066929 A173909 A165249

Adjacent sequences: A091174 A091175 A091176 * A091178 A091179 A091180

easy,nonn

Ray Chandler, Dec 26 2003

approved