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 A344520 #33 May 23 2021 15:37:43 %S A344520 2,7,7,4,8,5,1,7,7,3,4,4,5,5,8,6,2,2,1,3,3,2,5,9,5,6,9,6,2,8,8,4,7,9, %T A344520 0,2,2,4,7,9,7,0,3,4,2,6,2,1,6,8,1,1,2,1,7,9,0,5,0,0,3,2,3,5,1,9,5,0, %U A344520 6,2,9,5,9,0,9,2,8,2,5,4,8,0,8,9,6,1,6,5,4,0,5,5,8,6 %N A344520 Decimal expansion of 2*(1+sqrt(10))/3. %C A344520 Trisect the unit square into 3 regions with equal areas from a given midpoint on the squares edge. This sequence gives the decimal expansion of the perimeter of the triangular region. %F A344520 Decimal expansion of 2*(1 + k*sqrt(1/k^2 + 1))/k, where k = 3. %e A344520 2.7748517734455862213325956962884790... %t A344520 RealDigits[2 (1 + Sqrt[10])/3, 10, 200][[1]] // Flatten %Y A344520 Similar sequences into k regions: A344554 (k=5), A343069 (k=7), A344568 (k=9), A344569 (k=17). %K A344520 nonn,cons %O A344520 1,1 %A A344520 _Wesley Ivan Hurt_, May 22 2021