1,1

Any multiple of an element of this sequence is in the sequence. The primitive elements of this sequence are A062457.

Robert Israel, Table of n, a(n) for n = 1..10000

N:= 1000: # to get all terms <= N

S:= {}:

for i from 1 do

v:= ithprime(i)^i;

if v > N then break fi;

S:= S union {seq(j, j=v..N, v)};

od:

sort(convert(S, list)); # Robert Israel, Mar 27 2018

Cf. A062457, A000040.

Sequence in context: A182339 A110262 A176693 * A100417 A070089 A069167

Adjacent sequences: A118669 A118670 A118671 * A118673 A118674 A118675

nonn

Franklin T. Adams-Watters, May 19 2006

An incorrect g.f. was deleted by N. J. A. Sloane, Sep 13 2009

approved