OFFSET
1,1
LINKS
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-François Alcover, Jul 31 2013 *)
CROSSREFS
KEYWORD
nonn
AUTHOR
STATUS
approved