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 A177231 #22 Sep 08 2022 08:45:53
%S A177231 0,1,3,5,8,13,34,55,89,144,377,610,987,1597,4181,6765,10946,17711,
%T A177231 46368,196418,317811,39088169,165580141,433494437,701408733,
%U A177231 1134903170,1836311903,17167680177565,117669030460994,806515533049393,99194853094755497,160500643816367088
%N A177231 Fibonacci numbers whose decimal expansion does not contain any digit "2".
%C A177231 The probability that Fibonacci(n) contains no 2's goes to zero as n grows to infinity. The maximum term is possibly Fibonacci(101) having 21 digits, none of them being "2".
%e A177231 a(5) = 8 is the 5th Fibonacci number having no digit 2's.
%p A177231 F:= combinat[fibonacci]:
%p A177231 q:= n-> not(2 in convert(n, base, 10)):
%p A177231 select(q, {F(n)$n=0..101})[]; # _Alois P. Heinz_, May 06 2019
%t A177231 Join[{0}, Select[Fibonacci[Range[2, 50]], DigitCount[#, 10, 2]==0&]] (* _Harvey P. Dale_, Oct 01 2017 *)
%o A177231 (Magma) [0] cat [Fibonacci(n): n in [2..150] | not 2 in Intseq(Fibonacci(n))]; // _Vincenzo Librandi_, May 09 2019
%Y A177231 Cf. A000045, A177194, A177195, A176253.
%K A177231 nonn,base
%O A177231 1,3
%A A177231 _Carmine Suriano_, May 05 2010
%E A177231 Edited by _Charles R Greathouse IV_, Aug 03 2010
%E A177231 a(1) changed from 1 to 0 by _Alois P. Heinz_, May 06 2019