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 A105715 #5 Feb 16 2025 08:32:57 %S A105715 5,55,1597,75025,24157817,514229,5702887,32951280099,12586269025, %T A105715 225851433717,53316291173,591286729879,61305790721611591, %U A105715 135301852344706746049,5527939700884757,5527939700884757 %N A105715 Smallest m such that 5 is at the n-th position of the decimal representation of the m-th Fibonacci number. %C A105715 a(n) = A000045(A105705(n)). %H A105715 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/FibonacciNumber.html">Fibonacci Number</a> %e A105715 n=3: A105700(3)=25, a(3)=A000045(25)=75025->7[5]025; %e A105715 n=4: A105700(4)=37, a(4)=A000045(37)=24157817->241[5]7817. %Y A105715 Cf. A105711, A072351, A105712, A105713, A105714, A105716, A105717, A105718, A105719. %K A105715 nonn,base %O A105715 0,1 %A A105715 _Reinhard Zumkeller_, Apr 18 2005