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 A344172 #4 May 11 2021 18:21:25 %S A344172 1,2,3,1,0,7,3,4,1,4,8,7,0,1,0,1,3,6,1,0,2,8,1,1,6,2,3,0,4,1,4,7,6,3, %T A344172 9,2,9,6,0,2,6,8,0,8,5,7,4,1,5,1,1,6,9,7,0,8,1,5,6,6,2,5,0,0,1,4,9,9, %U A344172 4,5,3,1,5,3,9,8,0,3,6,3,6,7,3,8,1,8,3,7,4,8,8,6,6 %N A344172 Decimal expansion of 4*sqrt(5 + 2*sqrt(5)). %C A344172 Decimal expansion of the volume of a rhombic triacontahedron with unit edge length. %H A344172 Wikipedia, <a href="https://en.wikipedia.org/wiki/Rhombic_triacontahedron">Rhombic triacontahedron</a> %e A344172 12.310734148701013610281... %t A344172 RealDigits[4 Sqrt[5 + 2 Sqrt[5]], 10, 100][[1]] // Flatten %Y A344172 Cf. A344171 (rhombic triacontahedron surface area). %Y A344172 Cf. A344212 (rhombic triacontahedron midradius). %Y A344172 Cf. A019952 (rhombic triacontahedron radius of inscribed sphere). %K A344172 nonn,cons %O A344172 2,2 %A A344172 _Wesley Ivan Hurt_, May 10 2021