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 A223800 #6 Jul 23 2025 04:32:10 %S A223800 1163,1352569,818316500,370255807510,147492079608804, %T A223800 54863639440148543,19618352087687868206,6858114712379977473803, %U A223800 2366525095854843153846166,810568137864555472117760103,276450663558980453778169837060 %N A223800 Number of nX7 0..3 arrays with rows and antidiagonals unimodal. %C A223800 Column 7 of A223801 %H A223800 R. H. Hardin, <a href="/A223800/b223800.txt">Table of n, a(n) for n = 1..210</a> %e A223800 Some solutions for n=3 %e A223800 ..0..0..0..0..0..0..3....0..0..0..0..0..0..2....0..0..0..0..0..0..2 %e A223800 ..0..0..0..0..0..3..2....0..0..0..0..0..3..0....0..0..0..0..3..2..2 %e A223800 ..0..0..0..2..3..2..1....0..0..0..2..2..2..2....0..0..0..1..2..2..1 %K A223800 nonn %O A223800 1,1 %A A223800 _R. H. Hardin_ Mar 27 2013