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 A038177 #13 Jul 08 2025 22:09:20 %S A038177 1,3,12,58,256,1160,5120,22560,98304 %N A038177 Number of unbranched mono-5-catapolyheptagons. %D A038177 B. N. Cyvin et al., Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons, Match, No. 34 (Oct 1996), pp. 109-121. See Tables 4 and 5. %H A038177 B. N. Cyvin et al., <a href="/A323850/a323850.png">Isomer enumeration of unbranched catacondensed polygonal systems with pentagons and heptagons</a>, 1996 [Annotated scanned copy of pages 118, 119 only]. %Y A038177 Cf. A038175. %K A038177 nonn,more %O A038177 2,2 %A A038177 _N. J. A. Sloane_