Least number k such that n*k^n +/- 1 are twin primes, or a(n) = 0 if no such number exists.

Terms

a(0) =4a(1) =3a(2) =4a(3) =1a(4) =570a(5) =1a(6) =1464a(7) =54a(8) =60a(9) =14025a(10) =1932a(11) =1a(12) =7194a(13) =15a(14) =3612a(15) =0a(16) =4746a(17) =1a(18) =540a(19) =150a(20) =7060a(21) =138a(22) =80094a(23) =6160a(24) =33480a(25) =93135a(26) =0a(27) =366618a(28) =26058a(29) =1