Third diagonal of A027517.

Terms

a(0) =85a(1) =253a(2) =10882a(3) =346596a(4) =512612a(5) =226576a(6) =118286a(7) =57899a(8) =498278a(9) =261725a(10) =747515925a(11) =66272157632a(12) =153348270754a(13) =87567352793a(14) =25878151825a(15) =30509640448a(16) =906206569472