A003378 Numbers that are the sum of 11 positive 7th powers.

11, 138, 265, 392, 519, 646, 773, 900, 1027, 1154, 1281, 1408, 2197, 2324, 2451, 2578, 2705, 2832, 2959, 3086, 3213, 3340, 3467, 4383, 4510, 4637, 4764, 4891, 5018, 5145, 5272, 5399, 5526, 6569, 6696, 6823, 6950, 7077, 7204, 7331, 7458, 7585, 8755, 8882, 9009, 9136

Offset: 1

Author

N. J. A. Sloane

Keywords

• nonn
• easy

Examples

			From _David A. Corneth_, Aug 03 2020: (Start)
340152 is in the sequence as 340152 = 1^7 + 2^7 + 3^7 + 3^7 + 3^7 + 3^7 + 3^7 + 4^7 + 4^7 + 4^7 + 6^7.
595136 is in the sequence as 595136 = 1^7 + 2^7 + 2^7 + 2^7 + 2^7 + 3^7 + 5^7 + 5^7 + 5^7 + 5^7 + 6^7.
978139 is in the sequence as 978139 = 3^7 + 3^7 + 3^7 + 3^7 + 3^7 + 4^7 + 4^7 + 4^7 + 4^7 + 5^7 + 7^7. (End)
		

Links

• David A. Corneth, Table of n, a(n) for n = 1..10000

Crossrefs

Cf. A001015 (seventh powers).

Programs

Mathematica

With[{upto=10000},Select[Total/@Tuples[Range[Floor[Surd[upto,7]]]^7,11]//Union,#<=upto&]] (* Harvey P. Dale, May 13 2018 *)