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 A290305 #6 Jul 27 2017 04:21:01 %S A290305 1,1,1,2,7,26,154,1172,12049,148508,2061893,30545504 %N A290305 Number of 5-dimensional polyominoes with n cells (regarding mirror-images as distinct). %F A290305 a(n) = A006761(n) + A068870(n). %Y A290305 Cf. A049429, A049430, A006761 (one-sided), A255487 (4-dimensional case). %K A290305 nonn,more %O A290305 0,4 %A A290305 _Sean A. Irvine_, Jul 26 2017