cp's OEIS Frontend

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.

A319230 Triple prime Fibonacci numbers: Fibonacci numbers f such that (1) f is prime, (2) f's index is prime, and (3) the sum of f's digits is prime.

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%I A319230 #19 Sep 19 2018 11:51:02
%S A319230 2,5,89,514229,433494437,2971215073,
%T A319230 3061719992484545030554313848083717208111285432353738497131674799321571238149015933442805665949
%N A319230 Triple prime Fibonacci numbers: Fibonacci numbers f such that (1) f is prime, (2) f's index is prime, and (3) the sum of f's digits is prime.
%C A319230 a(8) = A000045(104911) has 21925 decimal digits. - _Alois P. Heinz_, Sep 17 2018
%F A319230 a(n) = A000045(A319393(n)).
%e A319230 514229 is prime; it is the 29th Fibonacci number and 29 is prime; and the sum of its digits is 23 and 23 is prime.
%t A319230 Select[With[{nn=2000},Pick[Fibonacci[Range[nn]],PrimeQ[Range[nn]]]],PrimeQ[#] && PrimeQ[ Total[ IntegerDigits[#]]]&]
%Y A319230 Cf. A000045, A001605, A005478, A007953, A075737, A319393. Subsequence of A111331.
%K A319230 nonn,base
%O A319230 1,1
%A A319230 _Harvey P. Dale_, Sep 14 2018