Least k such that k*11^n +/- 1 are twin primes.

Terms

a(0) =4a(1) =18a(2) =12a(3) =12a(4) =120a(5) =168a(6) =72a(7) =78a(8) =810a(9) =312a(10) =90a(11) =138a(12) =270a(13) =948a(14) =408a(15) =192a(16) =960a(17) =1920a(18) =738a(19) =4698a(20) =810a(21) =1872a(22) =6978a(23) =2058a(24) =3222a(25) =570a(26) =870a(27) =390a(28) =9708a(29) =14118