OFFSET
1,3
LINKS
Robert Israel, Table of n, a(n) for n = 1..490
MAPLE
N:= 500: # for terms <= N
G1:= add(x^(i^2), i=1..floor(sqrt(N))):
G2:= add(x^(i^3), i=1..floor(N^(1/3))):
G:= expand(G1^2*G2):
select(t -> coeff(G, x, t)=0, [$0..N]); # Robert Israel, Jun 12 2020
MATHEMATICA
m = 0;
n = 400.;
t = Union@Flatten@Table[x^2 + y^2 + z^3, {x, (n/2)^(1/2)}, {y, x, (n - x^2)^(1/2)}, {z, If[x^2 + y^2 < m, Floor[(m - 1 - x^2 - y^2)^(1/3)] + 1, 1], (n - x^2 - y^2)^(1/3)}];
Complement[Range[m, n], t]
CROSSREFS
KEYWORD
nonn
AUTHOR
XU Pingya, Jun 08 2020
STATUS
approved