1,1
121 is a member as 121 = 11^2. but 126 is not a member as 126 = 21*6 does not involve "^" sign.
Cf. A036057.
Sequence in context: A078815 A206472 A036057 * A031151 A016970 A174371
Adjacent sequences: A083506 A083507 A083508 * A083510 A083511 A083512
more,nonn
Amarnath Murthy and Meenakshi Srikanth (amarnath_murthy(AT)yahoo.com), May 05 2003