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 A292852 #18 Jul 23 2025 15:42:36 %S A292852 1,1,0,1,1,2,3,8,17,45,123,367,1148,3792 %N A292852 Spherical congruence-uniform lattices on n unlabeled nodes. %C A292852 A lattice is congruence-uniform if it can be constructed from the singleton-lattice by a sequence of interval doublings. A lattice is spherical if its Möbius function between least and greatest element equals 1 or -1. %H A292852 A. Day, <a href="http://dx.doi.org/10.4153/CJM-1979-008-x">Characterizations of finite lattices that are bounded-homomorphic images or sublattices of free lattices</a>, Canadian Journal of Mathematics, 31 (1979), 617-631. %H A292852 H. Mühle, <a href="https://arxiv.org/abs/1708.02104">On the lattice property of shard orders</a>, arXiv:1708.02104 [math.CO], 2017. %Y A292852 Cf. A292790. %K A292852 nonn,more %O A292852 1,6 %A A292852 _Henri Mühle_, Sep 25 2017 %E A292852 a(13)-a(14) from _Henri Mühle_, Aug 29 2019