(prime(n)^2 -1)*(prime(n)^2 - prime(n))/2.

Terms

a(0) =3a(1) =24a(2) =240a(3) =1008a(4) =6600a(5) =13104a(6) =39168a(7) =61560a(8) =133584a(9) =341040a(10) =446400a(11) =911088a(12) =1377600a(13) =1668744a(14) =2386848a(15) =3869424a(16) =5954280a(17) =6807600a(18) =9922968a(19) =12524400a(20) =14001984a(21) =19225440a(22) =23439864a(23) =31014720a(24) =43803648a(25) =51510000a(26) =55723824a(27) =64921608a(28) =69925680a(29) =80795904