OFFSET
1,1
COMMENTS
From Robert Israel, Apr 06 2021: (Start)
All terms == 3 (mod 8).
Conjecture: contains all numbers == 3 (mod 8) except 3, 11, 19, 27, 43, 51, 67, 99, 123, 163, 187, 267, 627. (End)
LINKS
EXAMPLE
107 is in the sequence since 107 = 1^2 + 5^2 + 9^2.
MAPLE
N:= 10^4: # for terms <= N
S:= {seq(seq(seq(x^2+y^2+z^2, z = 1 .. min(y-2, floor(sqrt(N-x^2-y^2))), 2), y = 1 .. min(x-2, floor(sqrt(N-x^2))), 2), x = 1 .. floor(sqrt(N)), 2)}:
sort(convert(S, list)); # Robert Israel, Apr 05 2021
CROSSREFS
KEYWORD
nonn
AUTHOR
Wesley Ivan Hurt, Apr 05 2021
STATUS
approved