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 A030525 #13 Apr 06 2020 12:32:25 %S A030525 0,1,2,5,10,21,41,85,167,345,680,1421,2823,5953,11902,25341,50993, %T A030525 109409,221372,478189,972346,2112181,4313451,9415165,19301199, %U A030525 42303241,87015978,191398741,394888368,871297141,1802488991,3987998101,8270169571,18342194721 %N A030525 Number of polyhexes of class PF2 with a particular symmetry. %C A030525 See reference for precise definition. %C A030525 Cyvin has incorrect a(13)=273 and a(14)=608 in Table III due to using incorrect values for A026298(13) and A026298(14) in Table II. - _Sean A. Irvine_, Apr 03 2020 %H A030525 S. J. Cyvin, Zhang Fuji, B. N. Cyvin, Guo Xiaofeng, and J. Brunvoll, <a href="https://doi.org/10.1021/ci00009a021">Enumeration and classification of benzenoid systems. 32. Normal perifusenes with two internal vertices</a>, J. Chem. Inform. Comput. Sci., 32 (1992), 532-540. %Y A030525 Cf. A026106, A026118, A026298, A030519, A030520, A030525, A030529, A030532, A030534. %K A030525 nonn %O A030525 4,3 %A A030525 _N. J. A. Sloane_ %E A030525 a(13) and a(14) corrected and more terms from _Sean A. Irvine_, Apr 03 2020