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 A356470 #20 Aug 21 2023 12:16:15 %S A356470 2,7,0,0,9,0,7,5,6,7,3,7,7,2,6,4,5,3,6,0,1,5,4,3,1,5,7,0,4,9,0,9,3,9, %T A356470 2,5,4,9,7,3,6,5,1,2,1,7,0,1,4,0,6,8,4,8,1,6,8,1,3,3,5,9,0,2,9,4,9,0, %U A356470 0,7,4,9,1,8,6,7,7,0,7,2,3,8,0,1,7,2,8,6,2 %N A356470 Decimal expansion of (3 - sqrt(5))/(2*sqrt(2)). %C A356470 Distance between points in the most spread-out hexagonal lattice such that the gap formed by any three mutually tangential unit disks contains a point inside or on its boundary. %C A356470 Side-length of an equilateral triangle contained in a unit side-length equilateral triangle such that every vertex and midpoint of the smaller triangle is at distance 1/2 from the nearest vertex of the larger triangle. %C A356470 A quartic number with denominator 2. Minimal polynomial is 4x^4 - 14x^2 + 1. - _Charles R Greathouse IV_, Sep 29 2022 %H A356470 Andrew Slattery, <a href="https://www.desmos.com/calculator/qxjlvsrvay">Interactive</a> %H A356470 <a href="/index/Al#algebraic_04">Index entries for algebraic numbers, degree 4</a> %e A356470 0.2700907567377264536... %t A356470 First[RealDigits[N[(3-Sqrt[5])/(2Sqrt[2]),89]]] (* _Stefano Spezia_, Aug 08 2022 *) %o A356470 (PARI) (3-sqrt(5))/sqrt(8) \\ _Charles R Greathouse IV_, Sep 29 2022 %Y A356470 Cf. A002193. %K A356470 nonn,cons %O A356470 0,1 %A A356470 _Andrew Slattery_, Aug 08 2022 %E A356470 More terms from _Stefano Spezia_, Aug 08 2022