0,1

A nontrivial power is a^b where a,b are integers and b>1.

Table of n, a(n) for n=0..6.

a(2)=216 because there are 11 even powers not larger than 216 and 9 odd powers not larger than 216, and 9 - 7 = 2.

Cf. A200730.

Sequence in context: A120822 A013065 A013096 * A116092 A085631 A074073

Adjacent sequences: A200726 A200727 A200728 * A200730 A200731 A200732

nonn,more

Graeme McRae, Nov 21 2011

approved