Squarefree semiprimes k such that (m+1)^2-k is also a square, where m = ceiling(sqrt(k)).

Terms

a(0) =33a(1) =39a(2) =85a(3) =119a(4) =133a(5) =253a(6) =377a(7) =403a(8) =527a(9) =629a(10) =703a(11) =943a(12) =989a(13) =1363a(14) =1537a(15) =1643a(16) =2183a(17) =2257a(18) =2747a(19) =2881a(20) =3053a(21) =3139a(22) =3337a(23) =3431a(24) =4187a(25) =4399a(26) =4897a(27) =5251a(28) =5429a(29) =6499