The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Please make a donation to keep the OEIS running. We are now in our 56th year. In the past year we added 10000 new sequences and reached almost 9000 citations (which often say "discovered thanks to the OEIS"). Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A003370 Numbers that are the sum of 3 positive 7th powers. 32
 3, 130, 257, 384, 2189, 2316, 2443, 4375, 4502, 6561, 16386, 16513, 16640, 18572, 18699, 20758, 32769, 32896, 34955, 49152, 78127, 78254, 78381, 80313, 80440, 82499, 94510, 94637, 96696, 110893, 156251, 156378, 158437, 172634, 234375, 279938, 280065, 280192, 282124, 282251 (list; graph; refs; listen; history; text; internal format)
 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) 1320614777 is in the sequence as 1320614777 = 9^7 + 12^7 + 20^7. 5868568576 is in the sequence as 5868568576 = 8^7 + 20^7 + 24^7. 17285710304 is in the sequence as 17285710304 = 3^7 + 12^7 + 29^7. (End) PROG (PARI) list(lim)=my(v=List(), x7, t); lim\=1; for(x=1, sqrtnint(lim-2, 7), x7=x^7; for(y=1, min(sqrtnint(lim-x7, 7), x), t=x7+y^7; for(z=1, min(sqrtnint(lim-t, 7), y), listput(v, t+z^7)))); Set(v) \\ Charles R Greathouse IV, Nov 05 2017 CROSSREFS Cf. A001015. Sequence in context: A097420 A037119 A113558 * A156957 A202030 A249379 Adjacent sequences:  A003367 A003368 A003369 * A003371 A003372 A003373 KEYWORD nonn,easy AUTHOR STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 3 11:58 EST 2020. Contains 338900 sequences. (Running on oeis4.)