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A025403 Numbers that are the sum of 4 positive cubes in exactly 1 way. 2
4, 11, 18, 25, 30, 32, 37, 44, 51, 56, 63, 67, 70, 74, 81, 82, 88, 89, 93, 100, 107, 108, 119, 126, 128, 130, 135, 137, 142, 144, 145, 149, 154, 156, 161, 163, 168, 180, 182, 187, 191, 193, 198, 200, 205, 206, 217, 224, 226, 233, 240, 243, 245, 254, 256, 261, 266, 271, 280 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..59.

Eric Weisstein's World of Mathematics, Cubic Number.

FORMULA

{n: A025457(n) = 1}. - R. J. Mathar, Jun 15 2018

MATHEMATICA

Reap[For[n = 1, n <= 300, n++, pr = Select[ PowersRepresentations[n, 4, 3], Times @@ # != 0 &]; If[pr != {} && Length[pr] == 1, Print[n, pr]; Sow[n]]]][[2, 1]] (* Jean-Fran├žois Alcover, Jul 31 2013 *)

CROSSREFS

Cf. A003327 (1 or more ways), A025399 (three distinct cubes).

Sequence in context: A043409 A030610 A003327 * A047703 A242679 A017029

Adjacent sequences:  A025400 A025401 A025402 * A025404 A025405 A025406

KEYWORD

nonn

AUTHOR

David W. Wilson

STATUS

approved

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Last modified April 25 16:59 EDT 2019. Contains 322461 sequences. (Running on oeis4.)