a(n) = ((n-th prime)^6-(n-th prime))/2.

Terms

a(0) =31a(1) =363a(2) =7810a(3) =58821a(4) =885775a(5) =2413398a(6) =12068776a(7) =23522931a(8) =74017933a(9) =297411646a(10) =443751825a(11) =1282863186a(12) =2375052100a(13) =3160681503a(14) =5389607641a(15) =11082180538a(16) =21090266791a(17) =25760187150a(18) =45229191051a(19) =64050141925a(20) =75667113108