OFFSET
1,1
EXAMPLE
a(2) = 423 = 2^2 + 3^2 + 7^2 + 19^2 = 2^2 + 3^2 + 11^2 + 17^2.
CROSSREFS
KEYWORD
nonn,hard,more
AUTHOR
Ilya Gutkovskiy, Jul 01 2024
STATUS
approved