Indices of primes in sequence defined by A(0) = 61, A(n) = 10*A(n-1) + 81 for n > 0.

Terms

a(0) =0a(1) =1a(2) =2a(3) =3a(4) =13a(5) =14a(6) =22a(7) =27a(8) =53a(9) =99a(10) =271a(11) =372a(12) =402a(13) =567a(14) =638a(15) =841a(16) =968a(17) =1254a(18) =1258a(19) =3046a(20) =4837a(21) =6388a(22) =12754a(23) =15141a(24) =34942a(25) =37651a(26) =38107a(27) =38685a(28) =39383a(29) =43392