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 A344569 #6 May 23 2021 15:37:58 %S A344569 2,1,2,1,1,0,4,2,7,8,3,4,4,2,8,2,4,9,0,1,3,3,3,3,1,9,7,9,2,7,9,6,8,5, %T A344569 0,2,4,2,8,1,1,4,2,9,6,3,6,4,4,5,2,0,1,9,1,4,4,7,3,7,6,1,1,3,2,3,1,2, %U A344569 6,8,0,2,7,0,6,5,3,3,2,3,7,5,8,4,5,3,1,7,0,6,4,1,0 %N A344569 Decimal expansion of 2*(1+sqrt(290))/17. %C A344569 Dissect the unit square into 17 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 with unit height. %F A344569 Decimal expansion of 2*(1 + k*sqrt(1/k^2 + 1))/k, where k = 17. %e A344569 2.121104278344282490133331979... %t A344569 RealDigits[2 (1 + Sqrt[290])/17, 10, 200][[1]] // Flatten %Y A344569 Similar sequences into k regions: A344520 (k=3), A344554 (k=5), A343069 (k=7), A344568 (k=9). %K A344569 nonn,cons %O A344569 1,1 %A A344569 _Wesley Ivan Hurt_, May 23 2021