OFFSET
1,1
COMMENTS
5^3=8^2+6^2+4^2+3^2, 6^3=10^2+8^2+6^2+4^2, ...
FORMULA
{n: n^3 in A004433}. - R. J. Mathar, Jun 15 2018
MATHEMATICA
z=100; lst={}; Do[a2=a^2; Do[b2=b^2; Do[c2=c^2; Do[d2=d^2; e2=a2+b2+c2+d2; e=e2^(1/3); If[IntegerQ[e], AppendTo[lst, e]], {d, c-1, 1, -1}], {c, b-1, 1, -1}], {b, a-1, 1, -1}], {a, 1, z}]; Union@lst
CROSSREFS
KEYWORD
nonn
AUTHOR
Vladimir Joseph Stephan Orlovsky, May 19 2010
EXTENSIONS
Terms > 33 from R. J. Mathar, Jun 15 2018
STATUS
approved