1,2

Table of n, a(n) for n=1..50.

125 (125 = 5^3) and 128 (128 = 2^7) are consecutive perfect powers. Since one of these is odd and the other is even, then 125 is in this sequence.

Cf. A001597, A175052

Sequence in context: A227646 A145820 A227647 * A274406 A261454 A022098

Adjacent sequences: A175050 A175051 A175052 * A175054 A175055 A175056

nonn

Leroy Quet, Dec 08 2009

Extended by Ray Chandler, Dec 10 2009

approved