Indices of primes in sequence defined by A(0) = 11, A(n) = 10*A(n-1) + 21 for n > 0.

A056244

Indices of primes in sequence defined by A(0) = 11, A(n) = 10*A(n-1) + 21 for n > 0.

Terms

    a(0) =0a(1) =1a(2) =3a(3) =5a(4) =93a(5) =159a(6) =359a(7) =1469a(8) =2897a(9) =3093a(10) =3111a(11) =15697a(12) =17955a(13) =42261a(14) =111031a(15) =249549

External references