Indices of primes in sequence defined by A(0) = 19, A(n) = 10*A(n-1) - 21 for n > 0.

A102025

Indices of primes in sequence defined by A(0) = 19, A(n) = 10*A(n-1) - 21 for n > 0.

Terms

    a(0) =0a(1) =2a(2) =4a(3) =6a(4) =10a(5) =11a(6) =27a(7) =35a(8) =383a(9) =628a(10) =719a(11) =1397a(12) =2001a(13) =2621a(14) =6456a(15) =19304a(16) =38507a(17) =46454a(18) =95975a(19) =102106a(20) =148504a(21) =189692

External references