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 A223634 #6 Jul 23 2025 04:19:01 %S A223634 16,256,2297,13599,61545,230619,748950,2171533,5738616,14032520, %T A223634 32116856,69421945,142742110,280837253,531285626,970419825,1717396652, %U A223634 2953706474,4949721932,8100222189,12971210226,20360769871,31377189150,47538110053 %N A223634 Number of nX5 0..1 arrays with rows, antidiagonals and columns unimodal. %C A223634 Column 5 of A223637 %H A223634 R. H. Hardin, <a href="/A223634/b223634.txt">Table of n, a(n) for n = 1..210</a> %e A223634 Some solutions for n=4 %e A223634 ..0..0..0..1..1....0..1..1..0..0....0..0..0..0..0....0..0..0..0..0 %e A223634 ..0..0..1..1..0....1..1..1..1..1....0..0..1..1..0....0..0..0..1..1 %e A223634 ..0..1..1..1..0....1..1..1..1..1....0..0..0..1..0....0..0..1..1..0 %e A223634 ..0..0..1..1..0....0..0..1..0..0....0..0..0..0..1....1..1..1..1..0 %K A223634 nonn %O A223634 1,1 %A A223634 _R. H. Hardin_ Mar 24 2013