Primes having only {1, 6, 8} as digits.

Terms

a(0) =11a(1) =61a(2) =181a(3) =661a(4) =811a(5) =881a(6) =1181a(7) =1811a(8) =1861a(9) =6661a(10) =8111a(11) =8161a(12) =8681a(13) =8861a(14) =11161a(15) =11681a(16) =16111a(17) =16661a(18) =16811a(19) =18181a(20) =18661a(21) =61681a(22) =61861a(23) =66161a(24) =68111a(25) =68161a(26) =68611a(27) =68881a(28) =81181a(29) =81611