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 A317162 #14 Nov 20 2018 16:31:51 %S A317162 3515,3570,2621,2820,2425,1722,5734,2226,1000,1237,2159,1342,3349, %T A317162 2696,2987,4570,11862,5688,2355,1551,3971,2848,3353,2358,1603,2060 %N A317162 Sinuosity of the 26 letters of the alphabet, lettertype Calibri, multiplied by thousand and rounded. %C A317162 It appears that the average sinuosity of the letters in the alphabet is 3.14 (Pi), like the supposed average sinuosity of the rivers in the world. %H A317162 Brady Haran and James Grime, <a href="https://www.youtube.com/watch?v=TUErNWBOkUM&t=9s">Pi me a river</a>, Numberphile video (2014). %F A317162 Sinuosity = L / l, where L is the length of the lines that make up the letter, l is the length of the straight line from the beginning to the end of the letter. %e A317162 In Calibri the letter 'A' is in a rectangle 1 by 0.75, so l = 0.75. The letter A consists of two sloping lines which length is two times square root of (1^2 + 0.375^2) plus a line length 0.5, so L = 2,636. Therefore the sinuosity of A is 3.515 (2.636 divided by 0.75). %K A317162 nonn,fini,full %O A317162 1,1 %A A317162 _Pieter Post_, Jul 23 2018