OFFSET
1,1
COMMENTS
LINKS
Ezra Brown and Marc Chamberland, Generalizing Gauss's gem, Amer. Math. Monthly, 119 (Aug. 2012), 597-601.
EXAMPLE
2*A215615(5) = 2*11 = 22 and 22^2 = 147^2 - 5*65^2, so a(1) = 65.
CROSSREFS
KEYWORD
nonn
AUTHOR
Jonathan Sondow, Aug 20 2012
STATUS
approved