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

Terms

a(0) =-1a(1) =-7a(2) =1a(3) =-23a(4) =73a(5) =49a(6) =217a(7) =193a(8) =217a(9) =721a(10) =553a(11) =1057a(12) =1513a(13) =1489a(14) =1609a(15) =2137a(16) =3241a(17) =2953a(18) =3937a(19) =4753a(20) =4417a(21) =5593a(22) =5857a(23) =6433a(24) =8617a(25) =9793a(26) =9769a(27) =11017a(28) =10993a(29) =9409