a(n) is the smallest prime p such that p*n! +- 1 are twin primes.

Terms

a(0) =2a(1) =2a(2) =3a(3) =2a(4) =17a(5) =7a(6) =7a(7) =3a(8) =61a(9) =29a(10) =167a(11) =401a(12) =167a(13) =19a(14) =311a(15) =461a(16) =97a(17) =919a(18) =47a(19) =71a(20) =1483a(21) =107a(22) =13a(23) =1571a(24) =821a(25) =1361a(26) =769a(27) =239a(28) =163a(29) =4229