1,2

2612736=(2*6*1*2*7*3*6)*phi(2*6*1*2*7*3*6), so 2612736 is in the sequence.

Sequence in context: A024345 A012524 A012670 this_sequence A090121 A003369 A099824

Adjacent sequences: A153422 A153423 A153424 this_sequence A153426 A153427 A153428

base,more,nonn

Farideh Firoozbakht (mymontain(AT)yahoo.com), Dec 26 2008