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 A114474 #17 Feb 16 2025 08:32:59
%S A114474 1,5,133,2277,32660,426486,5264705,62646781
%N A114474 Number of decimal digits in the denominator of Zeta(10^n).
%H A114474 J. Sondow and E. W. Weisstein, <a href="https://mathworld.wolfram.com/RiemannZetaFunction.html">MathWorld: Riemann Zeta Function</a>
%t A114474 Table[ Floor[ Log[ 10, Denominator[ Zeta[ 10^n]]] + 1], {n, 0, 6}] (* _Robert G. Wilson v_, Dec 01 2005 *)
%t A114474 IntegerLength[Denominator[Zeta[10^Range[0,7]]]] (* _Harvey P. Dale_, Aug 18 2016 *)
%Y A114474 Cf. A002432.
%K A114474 nonn,base
%O A114474 0,2
%A A114474 _Eric W. Weisstein_, Dec 01 2005
%E A114474 a(7) from _Vaclav Kotesovec_, Mar 05 2016