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 A328080 #27 Sep 19 2020 18:02:25 %S A328080 1,3,9,27,91,325,1201,4527,17227,65929,252997,972339,3739775,14389629, %T A328080 55378713,213148903,820441299,3158089841,12156483245,46794497819, %U A328080 180128888999,693382455013 %N A328080 Number of regions after 2n generations of Jim Conant's iterative dissection of a square. %C A328080 A bisection of A328078. See that entry for more information. %C A328080 In some sense this is a more fundamental sequence than A328078, since the configurations corresponding to the terms A328078(2n+1) are unfinished (or, to put it another way, could be compressed without changing the topology). %H A328080 N. J. A. Sloane, <a href="/A328078/a328078_2.txt">Notes on the Conant Gasket, the Conant Lattice, and Associated Sequences</a>, Preliminary version, Aug 23 2020 %Y A328080 Cf. A328078, A337262, A337642 (coordination sequence). %K A328080 nonn,more %O A328080 0,2 %A A328080 _N. J. A. Sloane_, Oct 13 2019 %E A328080 a(5)-a(13) from _Rémy Sigrist_, Oct 14 2019 %E A328080 a(14)-a(21) from _Rémy Sigrist_, Sep 09 2020