a(n) = ((n-th prime)^6-(n-th prime)^4)/4.

Terms

a(0) =12a(1) =162a(2) =3750a(3) =28812a(4) =439230a(5) =1199562a(6) =6013512a(7) =11728890a(8) =36939012a(9) =148529010a(10) =221645040a(11) =640963062a(12) =1186819620a(13) =1579486062a(14) =2693583912a(15) =5539117662a(16) =10542104070a(17) =12876632130a(18) =22609557762a(19) =32018718060a(20) =37826457012