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 A177372 #6 Jun 02 2025 02:54:56 %S A177372 1,1,2,3,5,8,13,21,34,55,89,144,233,610,2584,4181,10946,46368,121393, %T A177372 196418,514229,832040,1346269,14930352,39088169,63245986,102334155, %U A177372 165580141,1836311903,12586269025,32951280099,139583862445,365435296162 %N A177372 Fibonacci numbers whose decimal expansion does not contain any digit 7. %C A177372 Probability that Fib(n) contains no digit 7 goes to zero as n grows to infinity. I suppose that the maximum number is Fib(224) having 47 digits. %e A177372 a(14)=610 since it is the 14th Fibonacci containing no 7's. %t A177372 Select[Fibonacci[Range[100]],DigitCount[#,10,7]==0&] (* _Harvey P. Dale_, Dec 13 2014 *) %Y A177372 Cf. A000045, A177194, A177195, A177231, A177245, A177246, A176253, A177247 %K A177372 nonn,base %O A177372 1,3 %A A177372 _Carmine Suriano_, May 07 2010