First i such that gcd(prime(i)+1, prime(i+1)+1, ..., prime(i+n)+1) > 2.

Terms

a(0) =4a(1) =15a(2) =46a(3) =90a(4) =90a(5) =90a(6) =3875a(7) =4165a(8) =16591a(9) =21355a(10) =21355a(11) =21355a(12) =613491a(13) =613491a(14) =5541392a(15) =6067263a(16) =18351690a(17) =25813464a(18) =25813464a(19) =39500857a(20) =39500857a(21) =947438659a(22) =947438659a(23) =947438659a(24) =4645422093a(25) =4645422093a(26) =4645422093a(27) =4645422093a(28) =4645422093a(29) =4645422093