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 A223668 #6 Jul 23 2025 04:22:16 %S A223668 29,841,12577,119150,920106,6789502,51831694,418107416,3535212700, %T A223668 30760010124,270819014018,2389382612136,21054370910762, %U A223668 185252005692892,1628826042317036,14320554615413076,125935880053887644 %N A223668 Number of nX7 0..1 arrays with rows, diagonals and antidiagonals unimodal. %C A223668 Column 7 of A223669 %H A223668 R. H. Hardin, <a href="/A223668/b223668.txt">Table of n, a(n) for n = 1..210</a> %e A223668 Some solutions for n=4 %e A223668 ..0..0..0..0..0..0..0....0..0..1..1..1..1..0....0..0..1..0..0..0..0 %e A223668 ..0..0..1..0..0..0..0....0..1..1..1..1..1..0....1..1..1..1..1..1..1 %e A223668 ..0..0..0..0..0..0..0....1..1..1..1..0..0..0....0..0..0..0..0..1..1 %e A223668 ..0..0..1..0..0..0..0....0..1..0..0..0..0..0....0..0..0..0..0..0..0 %K A223668 nonn %O A223668 1,1 %A A223668 _R. H. Hardin_ Mar 25 2013