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 A075678 #22 Jul 04 2025 10:06:31 %S A075678 3,18,158,1611,17811,207395,2505858,31125711,394982973,5098498323, %T A075678 66733261455,883602795509,11814191512434,159283419280014, %U A075678 2163058572006613 %N A075678 Number of fixed (orientation matters) polyominoids (shapes made of faces of cubes) with n squares. %H A075678 Jorge Luis Mireles Jasso, <a href="http://www.geocities.ws/jorgeluismireles/polyominoids/">The Polyominoids</a> (gives a(4) and a(6)) %Y A075678 Cf. A075679 (free), A056846. %Y A075678 18th row of A366767. %K A075678 hard,nonn,more %O A075678 1,1 %A A075678 _Joseph Myers_, Sep 24 2002 %E A075678 a(13)-a(15) from _John Mason_, _Mia Muessig_, and Érika Roldán, Jul 04 2025