Indices of primes in sequence defined by A(0) = 61, A(n) = 10*A(n-1) + 41 for n > 0.
A101531
Indices of primes in sequence defined by A(0) = 61, A(n) = 10*A(n-1) + 41 for n > 0.
Terms
- a(0) =0a(1) =2a(2) =3a(3) =9a(4) =21a(5) =39a(6) =53a(7) =80a(8) =83a(9) =105a(10) =192a(11) =596a(12) =680a(13) =1362a(14) =1875a(15) =4023a(16) =14162a(17) =18732a(18) =20841a(19) =23727a(20) =26418a(21) =31449a(22) =44693a(23) =64766
External references
- oeis: A101531