This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A319393 #26 Jul 17 2021 11:22:53 %S A319393 3,5,11,29,43,47,449,104911 %N A319393 Indices of triple prime Fibonacci numbers: numbers k such that (1) Fibonacci(k) is prime, (2) k is prime, and (3) the sum of the digits of Fibonacci(k) is prime. %C A319393 Fibonacci(104911), corresponding to the 8th term of the sequence, has 21925 digits. %C A319393 a(9) > A001605(51) = 3340367. - _Alois P. Heinz_, Sep 18 2018 %F A319393 A000045(a(n)) = A319230(n). %e A319393 29 is a term of the sequence, since 29 is prime, Fibonacci(29) = A000045(29) = 514229 is prime and the digit sum of 514229 = A007953(514229) = 23 is also prime. - _Felix Fröhlich_, Sep 18 2018 %t A319393 Select[Prime[Range[100]],AllTrue[{Fibonacci[#],Total[ IntegerDigits[ Fibonacci[ #]]]}, PrimeQ] &] (* The program uses the AllTrue function from Mathematica version 10 *) %o A319393 (PARI) is(n) = if(!ispseudoprime(n), return(0), my(f=fibonacci(n)); if(!ispseudoprime(sumdigits(f)), return(0), if(ispseudoprime(f), return(1), return(0)))) \\ _Felix Fröhlich_, Sep 18 2018 %Y A319393 Cf. A000045, A001605, A007953, A319230. %K A319393 nonn,base,hard,more %O A319393 1,1 %A A319393 _Harvey P. Dale_, Sep 18 2018