A087646 a(n) is the first term of the first run of exactly n non-perfect-powers.

26, 2, 5, 28, 0, 10, 97337, 17, 2188, 3126, 2198, 37, 0, 50, 129, 65, 226, 82, 197, 101, 0, 2026, 1001, 145, 42850, 170, 485, 0, 6860, 0, 7745, 257, 0, 290, 1729, 14348908, 1332, 362, 2705, 401, 0, 442, 0, 9217, 0, 530, 21905

Offset: 1

Author

Lekraj Beedassy, Sep 23 2003

Keywords

• hard
• nonn

Examples

			a(3)=5 because (5,6,7) is the smallest consecutive triple of non-powers, followed by (33,34,35), (122,123,124), ...
The zeros above are conjectured and correspond to terms of A023057.
		

Crossrefs

Cf. A001597, A023057, A053289.

A complement to A001597.

Extensions

Edited by Don Reble, Sep 26 2003