OFFSET
1,2
LINKS
EXAMPLE
a(2) = 1729 = 1^3 + 12^3 = 9^3 + 10^3.
a(3) = 1009 = 1^3 + 2^3 + 10^3 = 4^3 + 6^3 + 9^3.
MAPLE
G:= mul(1+t*x^(i^3), i=1..35):
R:= -1:
for m from 2 do
C:= expand(coeff(G, t, m)):
C2:= convert(select(s -> subs(x=1, s)=2, C), list);
v:= min(map(degree, C2));
if v >= 36^3 + add(i^3, i=1..m-1) then break fi;
R:= R, v;
od:
R; # Robert Israel, Jul 08 2024
CROSSREFS
KEYWORD
sign
AUTHOR
Ilya Gutkovskiy, Jul 08 2024
EXTENSIONS
a(15)-a(27) from Robert Israel, Jul 08 2024
a(28)-a(39) from Michael S. Branicky, Jul 10 2024
STATUS
approved