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 A021046 #16 Sep 29 2023 14:20:03
%S A021046 0,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,
%T A021046 0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,
%U A021046 3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3,8,0,9,5,2,3
%N A021046 Decimal expansion of 1/42.
%C A021046 1/42 is the 6th Bernoulli number. - _Jean-François Alcover_, Dec 26 2013
%H A021046 <a href="/index/Rec#order_06">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 1).
%e A021046 0.0238095238095...
%t A021046 Join[{0},RealDigits[1/42,10,120][[1]]] (* _Harvey P. Dale_, Oct 05 2011 *)
%K A021046 nonn,cons
%O A021046 0,2
%A A021046 _N. J. A. Sloane_