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 A356204 #8 Aug 27 2022 13:47:48 %S A356204 0,18,2536,1136101,119227930,33636581266,1774960492720,685318499093455 %N A356204 a(n) is the second component y of the distance vector (x,y) in an oblique 120-degree coordinate system, 0 <= y <= x, between two nodes of an infinite triangular lattice of one-ohm resistors, such that the resistance R between the two nodes is as close as possible to n ohms, i.e., abs(R - n) is minimized. x is A356203(n). %e A356204 See table in A356203. %Y A356204 Cf. A355585, A355586, A355587, A355588, A355589, A355954. %Y A356204 Cf. A356201, A356202 (similar for square lattice). %K A356204 nonn,hard,more %O A356204 0,2 %A A356204 _Hugo Pfoertner_, Aug 13 2022