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 A022563 #18 Jul 08 2025 09:17:29 %S A022563 0,0,1,3,8,32,126,619,3332,20910,157721,1590330,23074092,487448150, %T A022563 14466253437,585505737038 %N A022563 Number of 2-connected claw-free graphs on n nodes. %H A022563 R. Faudree, E. Flandrin and Z. Ryjacek, <a href="https://doi.org/10.1016/S0012-365X(96)00045-3">Claw-free graphs - a survey</a>, Discr. Math., 164 (1997), 87-147. %H A022563 F. Hüffner, <a href="https://github.com/falk-hueffner/tinygraph">tinygraph</a>, software for generating integer sequences based on graph properties, version e8699da. %Y A022563 Cf. A022562, A022564. %K A022563 nonn,more %O A022563 1,4 %A A022563 _N. J. A. Sloane_ %E A022563 a(12) corrected using tinygraph by _Falk Hüffner_, Jan 18 2016 %E A022563 a(13)-a(16) from _Brendan McKay_, Jun 13 2021