OFFSET
1,1
COMMENTS
The sequence differs from A299708 by the gcd condition, which excludes representations like 325 = 18^2 + 1^2 = 15^2 + 10^2, 1025 = 32^2 + 1 = 25^2 + 20^2, 1445 = 38^2 + 1 = 34^2 + 17^2.
LINKS
Hugo Pfoertner, Table of n, a(n) for n = 1..10000
EXAMPLE
a(1) = 2210 because its 3 representations satisfy the conditions j > k > 1 and gcd(j,k) = 1: 2210 = 47^2 + 1 = 43^2 + 19^2 = 41^2 + 23^2 = 37^2 + 29^2.
CROSSREFS
KEYWORD
nonn
AUTHOR
Hugo Pfoertner, Feb 27 2018
STATUS
approved