Numbers k such that 2*k^2 - 4 is a square.

Terms

a(0) =2a(1) =10a(2) =58a(3) =338a(4) =1970a(5) =11482a(6) =66922a(7) =390050a(8) =2273378a(9) =13250218a(10) =77227930a(11) =450117362a(12) =2623476242a(13) =15290740090a(14) =89120964298a(15) =519435045698