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 A140240 #7 Nov 21 2024 07:47:34 %S A140240 5,0,5,3,6,0,5,1,0,2,8,4,1,5,7,3,0,6,9,7,1,3,1,4,8,7,3,9,8,7,4,2,1,9, %T A140240 4,4,5,0,4,3,8,7,4,6,6,1,9,3,6,7,6,3,8,7,2,6,7,8,4,7,5,5,7,4,8,1,1,5, %U A140240 0,1,2,0,9,6,2,0,4,2,4,4,4,8,2,3,4,9,7,4,8,4,4,5,6,0,2,9,2,0,3,2,1,0,1,8,5 %N A140240 Decimal expansion of arccos(7/8). %C A140240 Angle in radians of the least angle of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths. %C A140240 A140240 + A140242 + A140244 = arccos(7/8) + arccos(11/16) + arccos(-1/4) = Pi. %H A140240 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A140240 arccos(7/8) = arcsin(sqrt(15)/8) = arctan(sqrt(15)/7). %e A140240 0.50536051028415730697131487398742194450438746619367638726784755748115012096... %t A140240 RealDigits[ArcCos[7/8],10,120][[1]] (* _Harvey P. Dale_, Jan 13 2019 *) %o A140240 (PARI) acos(7/8) %Y A140240 Cf. A140239, A140241, A140242, A140243, A140244, A140245, A140246, A140247, A140248, A140249. %K A140240 cons,nonn %O A140240 0,1 %A A140240 _Rick L. Shepherd_, May 14 2008