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 A224412 #6 Jul 23 2025 05:09:47 %S A224412 32,324,1288,3436,7812,16420,32814,63202,118117,214919,381436,661132, %T A224412 1120283,1857749,3018052,4808608,7522116,11565280,17495232,26065236, %U A224412 38281486,55473066,79377418,112243966,156958871,217194245,297585532 %N A224412 Number of 5Xn 0..1 arrays with rows unimodal and antidiagonals nondecreasing. %C A224412 Row 5 of A224409 %H A224412 R. H. Hardin, <a href="/A224412/b224412.txt">Table of n, a(n) for n = 1..210</a> %F A224412 Empirical: a(n) = (1/3628800)*n^10 + (1/80640)*n^9 + (1/3456)*n^8 + (23/5760)*n^7 + (7213/172800)*n^6 + (683/2304)*n^5 + (138869/36288)*n^4 + (32143/2240)*n^3 + (32909/450)*n^2 - (753/20)*n - 44 for n>3 %e A224412 Some solutions for n=3 %e A224412 ..0..1..0....0..1..0....1..0..0....0..1..0....0..0..1....0..0..0....1..0..0 %e A224412 ..1..1..0....1..0..0....1..0..0....1..0..0....1..1..0....0..0..0....0..1..0 %e A224412 ..1..1..1....0..0..0....0..1..1....1..0..0....1..1..0....1..0..0....1..1..0 %e A224412 ..1..1..0....1..0..0....1..1..1....0..0..0....1..1..1....0..0..1....1..1..0 %e A224412 ..1..1..1....1..0..0....1..1..0....0..0..0....1..1..0....1..1..1....1..1..1 %K A224412 nonn %O A224412 1,1 %A A224412 _R. H. Hardin_ Apr 05 2013