OFFSET
1,2
COMMENTS
The largest term of the sequence is a(256) = 1167.
REFERENCES
R. K. Guy, Unsolved Problems In Number Theory, section C20.
LINKS
Chun Lok Yiu, Table of n, a(n) for n = 1..256
R. G. E. Pinch, L. E. Mattics and Emil Grosswald, Solutions to E3262, Amer. Math. Monthly, 97 (No. 3, 1990), 240-242.
EXAMPLE
52 = 4^2 + 6^2, so 52 is not in the sequence.
CROSSREFS
KEYWORD
nonn,fini,full
AUTHOR
Chun Lok Yiu, Aug 18 2020
STATUS
approved