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 A021261 #15 Aug 14 2025 10:49:24 %S A021261 0,0,3,8,9,1,0,5,0,5,8,3,6,5,7,5,8,7,5,4,8,6,3,8,1,3,2,2,9,5,7,1,9,8, %T A021261 4,4,3,5,7,9,7,6,6,5,3,6,9,6,4,9,8,0,5,4,4,7,4,7,0,8,1,7,1,2,0,6,2,2, %U A021261 5,6,8,0,9,3,3,8,5,2,1,4,0,0,7,7,8,2,1,0,1,1,6,7,3,1,5,1,7,5,0 %N A021261 Decimal expansion of 1/257. %H A021261 <a href="/index/Rec#order_129">Index entries for linear recurrences with constant coefficients</a>, order 129. %e A021261 0.0038910505836575875486381322957198443579766536964980544747... %t A021261 First[RealDigits[1/257, 10, 100, -1]] (* _Paolo Xausa_, Aug 04 2025 *) %o A021261 (PARI) 1./257 \\ _Michel Marcus_, Mar 12 2017 %K A021261 nonn,cons,easy %O A021261 0,3 %A A021261 _N. J. A. Sloane_