OFFSET
1,1
LINKS
Colin Barker, Table of n, a(n) for n = 1..750
EXAMPLE
5 is in the sequence because the only solution to x^2 + 5xy + y^2 = 25 with 0 < x < y is (x,y) = (1,3).
CROSSREFS
KEYWORD
nonn
AUTHOR
Colin Barker, Jan 24 2015
STATUS
approved