Number of 2 X 2 matrices with all elements in {0,...,n} and prime determinant.

Terms

a(0) =0a(1) =0a(2) =13a(3) =46a(4) =83a(5) =191a(6) =272a(7) =509a(8) =687a(9) =1010a(10) =1291a(11) =2019a(12) =2364a(13) =3468a(14) =4132a(15) =5079a(16) =6072a(17) =8298a(18) =9234a(19) =12189a(20) =13621a(21) =15984a(22) =18095a(23) =22965a(24) =24886a(25) =29942a(26) =33248a(27) =38385a(28) =42073a(29) =51053