a(n) = p(n)*p(n+1)*(p(n+1) - p(n)) + 1, where p(n) = prime(n).

Terms

a(0) =7a(1) =31a(2) =71a(3) =309a(4) =287a(5) =885a(6) =647a(7) =1749a(8) =4003a(9) =1799a(10) =6883a(11) =6069a(12) =3527a(13) =8085a(14) =14947a(15) =18763a(16) =7199a(17) =24523a(18) =19029a(19) =10367a(20) =34603a(21) =26229a(22) =44323a(23) =69065a(24) =39189a(25) =20807a(26) =44085a(27) =23327a(28) =49269a(29) =200915