Least integer k > 0 such that prime(k) - k*n is a square.

Terms

a(0) =1a(1) =1a(2) =12a(3) =35a(4) =75a(5) =181a(6) =490a(7) =1061a(8) =2707a(9) =6459a(10) =15932a(11) =40127a(12) =100362a(13) =251711a(14) =637236a(15) =1617181a(16) =4124444a(17) =10553419a(18) =27066987a(19) =69709706a(20) =179992917a(21) =465769804a(22) =1208198534a(23) =3140421726a(24) =8179002096a(25) =21338685437a(26) =55762149044a(27) =145935689364a(28) =382465573484