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 A140246 #14 Feb 16 2025 08:33:08 %S A140246 6,4,5,4,9,7,2,2,4,3,6,7,9,0,2,8,1,4,1,9,6,5,4,4,2,3,3,2,9,7,0,6,6,6, %T A140246 0,1,8,0,5,4,8,6,9,5,0,8,8,1,9,3,1,8,0,4,4,3,1,2,6,2,2,9,4,3,5,2,2,4, %U A140246 7,1,8,1,9,8,9,4,9,6,5,0,5,5,8,6,5,4,7,8,9,6,1,4,3,1,1,2,2,5,2,9,8,6,0,5,0 %N A140246 Decimal expansion of sqrt(15)/6. %C A140246 Inradius of the obtuse scalene triangle with sides of lengths 2, 3 and 4, the scalene triangle with least integer side lengths. Per the Weisstein link, the inradius is the area divided by the semiperimeter. %H A140246 Daniel Starodubtsev, <a href="/A140246/b140246.txt">Table of n, a(n) for n = 0..10000</a> %H A140246 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Inradius.html">Inradius</a>. %H A140246 <a href="/index/Al#algebraic_02">Index entries for algebraic numbers, degree 2</a> %F A140246 sqrt(15)/6 = A010472/6 = 2*A140239/9. %e A140246 0.64549722436790281419654423329706660180548695088193180443126229435224718198... %t A140246 RealDigits[Sqrt[15]/6,10,120][[1]] (* _Harvey P. Dale_, Mar 31 2013 *) %o A140246 (PARI) sqrt(15)/6 %Y A140246 Cf. A140239, A140240, A140241, A140242, A140243, A140244, A140245, A140247, A140248, A140249, A088543, A010472. %Y A140246 Equals sqrt(A331257(8)/A331258(8)) (squared inradii of triangles with integer sides). %K A140246 cons,nonn %O A140246 0,1 %A A140246 _Rick L. Shepherd_, May 14 2008