Indices of primes in sequence defined by A(0) = 19, A(n) = 10*A(n-1) - 31 for n > 0.

Terms

a(0) =0a(1) =2a(2) =3a(3) =6a(4) =11a(5) =50a(6) =86a(7) =122a(8) =197a(9) =201a(10) =536a(11) =830a(12) =1322a(13) =2507a(14) =2630a(15) =5567a(16) =6896a(17) =7523a(18) =9938a(19) =10673a(20) =11616a(21) =13256a(22) =14370a(23) =20175a(24) =36554a(25) =36873a(26) =40130a(27) =43124a(28) =58728a(29) =97043