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 A224176 #9 Mar 18 2025 20:56:22 %S A224176 56,3136,87878,1460836,16625026,143558572,1012166273,6125081331, %T A224176 32894121939,160366617391,721130521043,3026020511079,11954211905590, %U A224176 44767125938612,159803658410914,546205629183576,1794213349019225,5681633554205167,17388727776795588,51546300902092728 %N A224176 Number of 5 X n 0..3 arrays with rows, diagonals and antidiagonals unimodal and columns nondecreasing. %H A224176 R. H. Hardin, <a href="/A224176/b224176.txt">Table of n, a(n) for n = 1..210</a> %H A224176 R. H. Hardin, <a href="/A224176/a224176.txt">Empirical polynomial of degree 30</a> %F A224176 Empirical polynomial of degree 30 (see link above). %e A224176 Some solutions for n=3: %e A224176 ..1..2..0....0..3..0....0..1..1....0..2..0....0..1..0....0..3..0....2..1..1 %e A224176 ..1..2..1....1..3..2....0..1..1....0..3..0....0..2..0....0..3..0....2..2..1 %e A224176 ..1..3..1....2..3..2....0..2..1....2..3..2....0..2..0....1..3..0....2..2..1 %e A224176 ..2..3..1....2..3..2....0..2..2....2..3..2....0..2..0....1..3..1....2..2..1 %e A224176 ..2..3..2....2..3..3....3..3..3....2..3..3....1..3..1....2..3..2....3..2..2 %Y A224176 Row 5 of A224173. %K A224176 nonn %O A224176 1,1 %A A224176 _R. H. Hardin_, Mar 31 2013 %E A224176 Name corrected by _Andrew Howroyd_, Mar 18 2025