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 A021409 #17 Jul 08 2025 08:24:47
%S A021409 0,0,2,4,6,9,1,3,5,8,0,2,4,6,9,1,3,5,8,0,2,4,6,9,1,3,5,8,0,2,4,6,9,1,
%T A021409 3,5,8,0,2,4,6,9,1,3,5,8,0,2,4,6,9,1,3,5,8,0,2,4,6,9,1,3,5,8,0,2,4,6,
%U A021409 9,1,3,5,8,0,2,4,6,9,1,3,5,8,0,2,4,6,9,1,3,5,8,0,2,4,6,9,1,3,5
%N A021409 Decimal expansion of 1/405.
%H A021409 <a href="/index/Rec#order_09">Index entries for linear recurrences with constant coefficients</a>, signature (0, 0, 0, 0, 0, 0, 0, 0, 1).
%t A021409 realDigitsRecip[405] (* The realDigitsRecip program is at A021200 *) (* or *) PadRight[{0},120,{8,0,2,4,6,9,1,3,5}] (* _Harvey P. Dale_, Nov 21 2024 *)
%K A021409 nonn,cons
%O A021409 0,3
%A A021409 _N. J. A. Sloane_