Indices of primes in sequence defined by A(0) = 91, A(n) = 10*A(n-1) + 51 for n > 0.

Terms

a(0) =2a(1) =3a(2) =4a(3) =5a(4) =7a(5) =15a(6) =33a(7) =40a(8) =51a(9) =88a(10) =104a(11) =321a(12) =634a(13) =939a(14) =943a(15) =1130a(16) =1197a(17) =1742a(18) =1871a(19) =37913a(20) =41655a(21) =90095a(22) =99473a(23) =113467a(24) =140336a(25) =180431a(26) =263522