1,1

See comment in A066232.

(PARI): for(n=3, 10^9, if(eulerphi(n)==eulerphi(n-2)-eulerphi(n-1) && !issquarefree(n), print1(n, ", ")))

Sequence in context: A143163 A132642 A052359 this_sequence A109030 A093223 A069370

Adjacent sequences: A066356 A066357 A066358 this_sequence A066360 A066361 A066362

nonn

Jason Earls (zevi_35711(AT)yahoo.com), Dec 20 2001