cp's OEIS Frontend

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.

A201229 Number of nX2 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.

This page as a plain text file.
%I A201229 #7 Jul 22 2025 16:10:02
%S A201229 6,2,34,24,306,152,2697,1709,26353,14274,256132,155679,2577102,
%T A201229 1435626,25812024,15341134,262850473,148007489,2677750617,1572346141,
%U A201229 27580713570,15652657223,284558852486,165998453918,2956634276151,1686097239526
%N A201229 Number of nX2 0..3 arrays with every row and column running average nondecreasing rightwards and downwards, and the number of instances of each value within one of each other.
%C A201229 Column 2 of A201235
%H A201229 R. H. Hardin, <a href="/A201229/b201229.txt">Table of n, a(n) for n = 1..82</a>
%e A201229 Some solutions for n=10
%e A201229 ..0..0....0..1....0..0....0..0....0..0....0..0....0..0....0..0....0..0....0..0
%e A201229 ..0..0....0..1....0..0....0..0....0..1....0..0....0..0....0..0....0..1....0..1
%e A201229 ..0..2....0..1....0..1....0..2....0..2....0..1....0..2....0..3....0..2....0..1
%e A201229 ..2..2....0..1....1..3....1..1....0..1....1..1....1..1....1..1....0..1....0..3
%e A201229 ..3..3....0..3....1..1....1..1....2..3....2..2....1..2....1..3....1..3....2..2
%e A201229 ..1..3....2..2....1..3....1..3....3..3....1..3....2..3....1..3....3..3....1..2
%e A201229 ..1..2....3..3....2..3....2..3....2..2....2..2....1..2....2..2....2..3....3..3
%e A201229 ..1..3....2..3....2..2....3..3....1..2....1..2....1..2....1..3....1..2....2..3
%e A201229 ..1..2....1..3....3..3....2..3....1..3....3..3....3..3....2..3....2..3....1..3
%e A201229 ..1..3....2..2....2..2....2..2....1..3....3..3....3..3....2..2....1..2....1..2
%K A201229 nonn
%O A201229 1,1
%A A201229 _R. H. Hardin_ Nov 28 2011