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 A224036 #6 Jul 23 2025 04:55:34 %S A224036 7,34,119,363,1064,3107,9125,26928,79800,237348,708163,2118654, %T A224036 6353180,19088180,57442255,173085671,522085599,1576088206,4761041486, %U A224036 14389487483,43507313943,131587493711,398081815019,1204514245101,3645147239577 %N A224036 Number of nX6 0..1 arrays with antidiagonals unimodal and rows and diagonals nondecreasing. %C A224036 Column 6 of A224038 %H A224036 R. H. Hardin, <a href="/A224036/b224036.txt">Table of n, a(n) for n = 1..210</a> %F A224036 Empirical: a(n) = 7*a(n-1) -15*a(n-2) +6*a(n-3) +11*a(n-4) -4*a(n-5) -7*a(n-6) +6*a(n-7) -6*a(n-8) +8*a(n-9) -8*a(n-10) +16*a(n-11) for n>13 %e A224036 Some solutions for n=3 %e A224036 ..0..0..0..0..0..0....0..0..0..0..0..1....0..0..0..0..0..1....0..0..0..0..0..0 %e A224036 ..0..0..0..0..0..0....0..0..1..1..1..1....0..0..0..0..1..1....0..0..0..0..0..0 %e A224036 ..0..0..0..1..1..1....1..1..1..1..1..1....0..0..1..1..1..1....0..0..0..0..0..0 %K A224036 nonn %O A224036 1,1 %A A224036 _R. H. Hardin_ Mar 30 2013