Indices of primes in sequence defined by A(0) = 31, A(n) = 10*A(n-1) + 51 for n > 0.

A101839

Indices of primes in sequence defined by A(0) = 31, A(n) = 10*A(n-1) + 51 for n > 0.

Terms

    a(0) =0a(1) =5a(2) =10a(3) =12a(4) =18a(5) =22a(6) =66a(7) =107a(8) =117a(9) =175a(10) =672a(11) =779a(12) =1087a(13) =1218a(14) =1655a(15) =6244a(16) =10738a(17) =12589a(18) =17512a(19) =25999a(20) =32543a(21) =53273a(22) =131783

External references