Numbers x such that 20*x^2 + 1 is a perfect square.
A207832
Numbers x such that 20*x^2 + 1 is a perfect square.
Terms
- a(0) =0a(1) =2a(2) =36a(3) =646a(4) =11592a(5) =208010a(6) =3732588a(7) =66978574a(8) =1201881744a(9) =21566892818a(10) =387002188980
External references
- oeis: A207832