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 A244196 #25 Jul 19 2021 22:59:54 %S A244196 288,414,450,684,972,1080,1206,1242,1296,1458,1620,1674,1782,1998, %T A244196 2196,2304,2592,2826,2988,3150 %N A244196 Cumulative angle at the center of successive numbered sectors of a standard competition dartboard, with numbers traversed in order. %C A244196 A standard dartboard is divided into 20 sectors each subtending an angle of 18 degrees. %C A244196 The sequence is generated by considering the positive X-axis to be running through the center of the sector numbered "6" and defining this to be 0 degrees. A line collinear with X is then rotated clockwise until each numbered sector is traversed through the center of the sector in question. The total number of degrees is summed as each sector is traversed. %H A244196 Wikipedia, <a href="http://en.wikipedia.org/wiki/Darts">Darts</a> %Y A244196 Cf. A003833, A008575, A244512. %K A244196 nonn,fini,full %O A244196 1,1 %A A244196 _Philip Mizzi_, Jul 21 2014