A003372 Numbers that are the sum of 5 positive 7th powers.

5, 132, 259, 386, 513, 640, 2191, 2318, 2445, 2572, 2699, 4377, 4504, 4631, 4758, 6563, 6690, 6817, 8749, 8876, 10935, 16388, 16515, 16642, 16769, 16896, 18574, 18701, 18828, 18955, 20760, 20887, 21014, 22946, 23073, 25132, 32771, 32898, 33025, 33152, 34957, 35084, 35211

Offset

1,1

Links

Chai Wah Wu, Table of n, a(n) for n = 1..10000

Example

From David A. Corneth, Aug 04 2020: (Start)
16898692 is in the sequence as 16898692 = 3^7 + 4^7 + 8^7 + 9^7 + 10^7.
34270142 is in the sequence as 34270142 = 1^7 + 1^7 + 9^7 + 10^7 + 11^7.
43759626 is in the sequence as 43759626 = 2^7 + 3^7 + 9^7 + 11^7 + 11^7. (End)

Prog

(PARI) list(lim)=my(v=List(), A, B, C, D); lim\=1; for(a=1, sqrtnint(lim-4, 7), A=a^7; for(b=1, min(sqrtnint(lim-A-3, 7), a), B=A+b^7; for(c=1, min(sqrtnint(lim-B-2, 7), b), C=B+c^7; for(d=1, min(sqrtnint(lim-C-1, 7), c), D=C+d^7; for(e=1, min(sqrtnint(lim-D, 7), d), listput(v, D+e^7)))))); Set(v) \\ Charles R Greathouse IV, Nov 05 2017

Crossrefs

Cf. A001015 (seventh powers).

Sequence in context: A070247 A171375 A191409 * A187357 A135758 A152794

Adjacent sequences: A003369 A003370 A003371 * A003373 A003374 A003375

Keyword

nonn,easy

Author

N. J. A. Sloane

Status

approved