A362428 a(n) is the least positive integer that can be expressed as the sum of one or more consecutive perfect powers (A001597) in exactly n ways, or -1 if no such integer exists.

1, 25, 441

Offset: 1

Author

Ilya Gutkovskiy, Apr 19 2023

Keywords

• nonn
• bref
• more

Comments

a(4) > 1.5 * 10^8.

No further terms < 2.8*10^14. - Michael S. Branicky, Apr 20 2023

Examples

			For n = 2: 25 = 25 = 9 + 16.
For n = 3: 441 = 441 = 216 + 225 = 128 + 144 + 169.
		

Links

• Eric Weisstein's World of Mathematics, Perfect Power

Crossrefs

Cf. A001597.