Numbers n of the form n = (x^2+1)(y^2+1), x,y > 0.
4, 10, 20, 25, 34, 50, 52, 74, 85, 100, 130, 164, 170, 185, 202, 244, 250, 260, 289
1 seqfan posts
Wed Aug 18 20:41:17 CEST 2010 [seqfan] Re: A135282: We can go ahead and change "seems" to "is known"