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 A331156 #12 Jul 09 2025 04:50:25 %S A331156 1,1,1,3,10,44,233 %N A331156 Number of (weakly) connected gluing-parallel or GP-posets with n points. %H A331156 Uli Fahrenberg, Christian Johansen, Georg Struth, Ratan Bahadur Thapa, <a href="https://arxiv.org/abs/1910.06162">Generating Posets Beyond N</a>, arXiv:1910.06162 [cs.FL], 2019. %Y A331156 The seven sequences in the table of Uli Fahrenberg et al., 2019, are A000112, A003430, A079566, A331156, A331157, A331158, A331159. %K A331156 nonn,more %O A331156 0,4 %A A331156 _N. J. A. Sloane_, Jan 16 2020, following a suggestion from _Michael De Vlieger_ %E A331156 Typo in a(6) corrected by _Uli Fahrenberg_, Feb 03 2024