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 A036673 #23 Nov 20 2020 20:45:30 %S A036673 1,2,3,9,20,64,205,747,2767,10850,43254,176990,735007,3099272, %T A036673 13220407,57001841,248009246,1087947441,4807232915,21381055533, %U A036673 95660032110,430298114499,1945096434552,8832200860663,40271358004756,184325394540531,846667179332120 %N A036673 Number of stereoisomers of all n-node acyclic hydrocarbons with no triple bonds. %C A036673 Alternatively, unrooted steric quartic trees allowing single and double edges with n nodes. - _Natan Arie Consigli_, Jun 30 2017 %C A036673 Read has incorrect a(10)=14159. - _Sean A. Irvine_, Nov 20 2020 %H A036673 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a036/A036673.java">Java program</a> (github) %H A036673 Sean A. Irvine, <a href="/A036672/a036672.pdf">Correction of A036672(10) and A036673(10)</a>, 2020 %H A036673 R. C. Read, <a href="/A000598/a000598.pdf">The Enumeration of Acyclic Chemical Compounds</a>, pp. 25-61 of A. T. Balaban, ed., Chemical Applications of Graph Theory, Ac. Press, 1976. [Annotated scanned copy] See p. 60. %Y A036673 Cf. A000628 (steric quartic trees with no double edges). %K A036673 nonn %O A036673 1,2 %A A036673 _N. J. A. Sloane_ %E A036673 Name clarified by _Natan Arie Consigli_, Jun 30 2017 %E A036673 a(10) corrected and more terms from _Sean A. Irvine_, Nov 20 2020