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

1,1

Links

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

Example

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)

Mathematica

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

Crossrefs

Cf. A001015 (seventh powers).

Sequence in context: A201111 A124079 A174289 * A142930 A024142 A024296

Adjacent sequences: A003375 A003376 A003377 * A003379 A003380 A003381

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved