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 A378673 #13 Jun 08 2025 17:32:57 %S A378673 0,0,0,0,0,0,1,4,16,49,140,390,1039,2724,7058,18239,46964,121322, %T A378673 314155,817407,2136273,5611821,14811062,39275823,104603284,279746752, %U A378673 751001466,2023355751,5469448788,14830713681,40330618790,109972131832,300628497213,823779154305,2262365724468 %N A378673 Numbers of not uniquely embeddable trees on n vertices. %H A378673 Andrew Howroyd, <a href="/A378673/b378673.txt">Table of n, a(n) for n = 1..500</a> %H A378673 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/UniquelyEmbeddableGraph.html">Uniquely Embeddable Graph</a>. %H A378673 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Tree.html">Tree</a>. %F A378673 a(n) = A000055(n) - A378672(n). %Y A378673 Cf. A378672 (uniquely embeddable trees). %Y A378673 Cf. A372853 (uniquely embeddable planar connected graphs). %Y A378673 Cf. A000055 (trees). %K A378673 nonn %O A378673 1,8 %A A378673 _Eric W. Weisstein_, Dec 03 2024 %E A378673 a(13) onwards from _Andrew Howroyd_, Jun 08 2025