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 A180768 #7 Aug 04 2025 10:23:04 %S A180768 13,3809,549125,82032712,12387396391,1865051797753,280971809714842, %T A180768 42325704140613463,6375989200126477033,960486733026829603882, %U A180768 144688833229486140773839,21796094961106865613962841 %N A180768 Half the number of n X 8 binary arrays with each element equal to at least one neighbor. %C A180768 Column 8 of A180771. %H A180768 R. H. Hardin, <a href="/A180768/b180768.txt">Table of n, a(n) for n=1..99</a> %Y A180768 Cf. A180771. %K A180768 nonn %O A180768 1,1 %A A180768 _R. H. Hardin_, Sep 20 2010