a(n) = prime(n)^2 - prime(n+1).

Terms

a(0) =1a(1) =4a(2) =18a(3) =38a(4) =108a(5) =152a(6) =270a(7) =338a(8) =500a(9) =810a(10) =924a(11) =1328a(12) =1638a(13) =1802a(14) =2156a(15) =2750a(16) =3420a(17) =3654a(18) =4418a(19) =4968a(20) =5250a(21) =6158a(22) =6800a(23) =7824a(24) =9308a(25) =10098a(26) =10502a(27) =11340a(28) =11768a(29) =12642