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 A224037 #6 Jul 23 2025 04:55:51 %S A224037 8,43,161,508,1505,4395,12856,37808,111683,331170,985275,2939862, %T A224037 8794582,26369119,79223520,238443031,718767456,2169574122,6556325043, %U A224037 19832290886,60040894419,181897703946,551397549898,1672317703423,5074042241500 %N A224037 Number of nX7 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. %C A224037 Column 7 of A224038 %H A224037 R. H. Hardin, <a href="/A224037/b224037.txt">Table of n, a(n) for n = 1..210</a> %F A224037 Empirical: a(n) = 8*a(n-1) -21*a(n-2) +15*a(n-3) +15*a(n-4) -16*a(n-5) -9*a(n-6) +12*a(n-7) -8*a(n-8) +10*a(n-9) -12*a(n-10) +16*a(n-11) -16*a(n-12) +32*a(n-13) for n>16 %e A224037 Some solutions for n=3 %e A224037 ..0..0..0..0..0..0..1....0..0..0..0..0..0..0....0..0..0..0..0..1..1 %e A224037 ..0..0..1..1..1..1..1....0..0..0..0..1..1..1....1..1..1..1..1..1..1 %e A224037 ..0..0..0..1..1..1..1....0..0..0..1..1..1..1....1..1..1..1..1..1..1 %K A224037 nonn %O A224037 1,1 %A A224037 _R. H. Hardin_ Mar 30 2013