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 A197464 #13 Dec 16 2024 22:18:44 %S A197464 12,18,36,75,168,386,888,2079,4960,11988,29280,72145,179112,447636, %T A197464 1124956,2840097,7197780,18301738,46669404,119308938,305704584, %U A197464 784938678,2019335340,5204309886,13435321764,34738762062,89952855848 %N A197464 Number of fixed poly-[4.6.12]-tiles (holes allowed) with n cells (division into triangles is significant). %D A197464 Branko Gruenbaum and G. C. Shephard, Tilings and Patterns. W. H. Freeman, New York, 1987, Sections 2.7, 6.2 and 9.4. %Y A197464 Cf. A197462, A197463. %K A197464 hard,nonn %O A197464 1,1 %A A197464 _Joseph Myers_, Oct 15 2011 %E A197464 a(20)-a(26) from _Aaron N. Siegel_, Jun 03 2022 %E A197464 a(27) from _Johann Peters_, Dec 16 2024