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 A357418 #11 Aug 03 2025 08:52:08 %S A357418 5,4,4,6,6,9,7,7,0,7,5,7,6,5,7,9,4,4,5,2,9,0,5,6,9,2,3,3,9,9,2,2,9,1, %T A357418 4,0,5,8,5,3,5,2,2,7,7,7,0,5,2,4,5,3,7,0,8,0,9,5,0,1,3,5,8,4,7,8,9,1, %U A357418 4,8,8,0,9,9,7,0,5,1,4,7,8,3,7,8,2,7,6,9,6,6,7,2,8,3,1 %N A357418 Decimal expansion of (207 - 33*sqrt(33))/32. %C A357418 This constant expresses the Turán density of the extension of the 4-graph formed by 3 disjoint edges. For the details about the construction of the extension, see Wu's article. %H A357418 Biao Wu, <a href="https://doi.org/10.37236/10645">An irrational Turán density via hypergraph Lagrangian densities</a>, The Electronic Journal of Combinatorics 29(3) (2022), #P3.62. %F A357418 Minimal polynomial: 16*x^2 - 207*x + 108. - _Stefano Spezia_, Aug 03 2025 %e A357418 0.54466977075765794452905692339922914058535... %t A357418 First[RealDigits[N[(207 - 33 Sqrt[33])/32, 95]]] %Y A357418 Cf. A010488. %K A357418 nonn,cons,easy %O A357418 0,1 %A A357418 _Stefano Spezia_, Sep 27 2022