1419612domain: NAppears in sequences2n^4+6n^2+4 = 2(n^2+1)(n^2+2).at n=28A120571Length of the long leg in the unique primitive Pythagorean triple (x,y,z) such that (x-y+z)/2 is A000032(n) and such that its long leg and its hypotenuse are consecutive natural numbers.at n=14A382379