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 A307235 #52 Oct 01 2022 00:18:38 %S A307235 1,9,7,5,5,9,2,8,8,4,7,8,1,5,0,0,5,1,5,9,1,6,4,6,5,2,5,8,5,1,3,5,8,9, %T A307235 3,4,6,5,1,6,7,4,7,9,1,6,8,4,3,2,0,8,9,8,4,5,6,0,4,2,4,3,9,1,1,7,6,6, %U A307235 4,7,0,9,2,8,0,5,8,4,2,8,4,7,4,2,4,6,2,5,4,2,6,4,3,1,2,1,3 %N A307235 Decimal expansion of sqrt(2) + sqrt((3-3*sqrt(3)+Pi)/3). %C A307235 This is claimed to be the minimal cut length required to cut a unit square into 4 pieces of equal area after making certain assumptions about the cuts (compare A307234). %H A307235 Eduard Baumann, <a href="http://www.baumanneduard.ch/EqAreaOverview.htm">Dissection of regular polygons in n equal area pieces with minimal cut length</a> %H A307235 Zhao Hui Du, <a href="/A307235/a307235.png">Picture showing how to cut the square into 4 pieces</a> %H A307235 Paolo Licheri, <a href="http://web.tiscalinet.it/paololicheri/figure/f006x.htm">f006 Tagliare una torta</a>, (Cut a Cake, in Italian). %H A307235 Yi Yang, <a href="https://translate.google.com/translate?hl=&sl=zh-CN&tl=en&u=https%3A%2F%2Fbbs.emath.ac.cn%2Fforum.php%3Fmod%3Dredirect%26goto%3Dfindpost%26ptid%3D2745%26pid%3D33264%26fromuid%3D20">A Chinese BBS</a> %H A307235 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A307235 1.975592884781500515916465258513589346516747916843208984560424391176647... %t A307235 RealDigits[Sqrt[2] + Sqrt[(Pi+3-3*Sqrt[3])/3], 10, 100][[1]] (* _G. C. Greubel_, Jul 02 2019 *) %o A307235 (PARI) default(realprecision, 100); sqrt(2) + sqrt((Pi+3-3*sqrt(3))/3) \\ _G. C. Greubel_, Jul 02 2019 %o A307235 (Magma) SetDefaultRealField(RealField(100)); R:= RealField(); Sqrt(2) + Sqrt((Pi(R)+3-3*Sqrt(3))/3); // _G. C. Greubel_, Jul 02 2019 %o A307235 (Sage) numerical_approx(sqrt(2) + sqrt((pi+3-3*sqrt(3))/3), digits=100) # _G. C. Greubel_, Jul 02 2019 %Y A307235 Cf. A307234. %K A307235 nonn,cons %O A307235 1,2 %A A307235 _Zhao Hui Du_, Mar 30 2019 %E A307235 Terms a(32) onward added by _G. C. Greubel_, Jul 02 2019 %E A307235 Edited by _N. J. A. Sloane_, Aug 16 2019