Numbers k such that 2*k*(k+2) is a square.

Terms

a(0) =0a(1) =2a(2) =16a(3) =98a(4) =576a(5) =3362a(6) =19600a(7) =114242a(8) =665856a(9) =3880898a(10) =22619536a(11) =131836322a(12) =768398400a(13) =4478554082a(14) =26102926096a(15) =152139002498a(16) =886731088896