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 A112828 #11 Feb 16 2025 08:32:59 %S A112828 0,1,1,6,1,2,6,1,16,18,2,22,6,1,28,30,16,1,18,1,10,42,22,46,48,2,13, %T A112828 18,28,58,60,1,16,66,1,70,72,1,1,78,80,41,84,1,44,90,46,1,96,1,4,102, %U A112828 13,53,108,22,112,6,58,1,60,1,1,126,16,130,66,1,8,138,140,1,144,1,148 %N A112828 a(n) is the decimal period of the fractional part of BernoulliB(2n). %H A112828 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/BernoulliNumber.html">Bernoulli Number</a> %Y A112828 Cf. A112829. %K A112828 nonn,base %O A112828 0,4 %A A112828 _Eric W. Weisstein_, Sep 21 2005