1,1

This sequence has the terms from A067933 (all primes), plus 511 and 3359231 that are not primes.

Checked up to x<70000000

(PARI) for(x=1, 70000000, if(((x)+1)%eulerphi((x)-1)==0, print((x))))

Cf. A067933.

Sequence in context: A028906 A118496 A085300 this_sequence A093487 A067933 A005234

Adjacent sequences: A119385 A119386 A119387 this_sequence A119389 A119390 A119391

nonn

Jorge Coveiro (jorgecoveiro(AT)yahoo.com), Jul 25 2006