Indices of primes in sequence defined by A(0) = 79, A(n) = 10*A(n-1) - 21 for n > 0.

Terms

a(0) =0a(1) =1a(2) =2a(3) =5a(4) =7a(5) =17a(6) =18a(7) =20a(8) =31a(9) =47a(10) =64a(11) =71a(12) =98a(13) =119a(14) =200a(15) =307a(16) =716a(17) =967a(18) =1343a(19) =2131a(20) =3566a(21) =3967a(22) =8326a(23) =10597a(24) =12464a(25) =15874a(26) =18894a(27) =28610a(28) =29417a(29) =83692