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 A317704 #32 Jun 27 2021 12:38:38 %S A317704 3,2,4,8,1,6,3,6,5,9,0,5,2,9,7,5,3,5,9,7,4,4,2,7,1,6,1,5,2,7,3,4,6,4, %T A317704 2,1,1,5,6,0,0,6,8,2,0,9,8,7,9,7,8,0,3,1,5,9,6,4,2,5,7,1,0,9,3,2,4,2, %U A317704 6,3,7,3,3,4,0,1,0,1,9,0,7,9,3,8,2,1,6 %N A317704 Decimal expansion of arctan(2/Pi)*180/Pi. %C A317704 The degree of the slope when spreading books. The binding and cover are such that each of the pages follows a quarter-circle arc that begins at the binding and intersects it perpendicularly, and that the length of the arc for the last (or first) page of the book is zero. %C A317704 _______ %C A317704 =======\ %C A317704 ========\ %e A317704 32.481636590529753597442716152734642... %t A317704 RealDigits[ArcTan[2/Pi]*180/Pi, 10, 100][[1]] (* _Amiram Eldar_, Jun 26 2021 *) %o A317704 (PARI) atan(2/Pi)*180/Pi %Y A317704 Cf. A232247 (arctan(2/Pi)). %K A317704 nonn,cons %O A317704 2,1 %A A317704 _Seiichi Manyama_, Aug 04 2018 %E A317704 More terms from _Jon E. Schoenfield_, Aug 05 2018