|
%I #5 Mar 31 2012 12:35:56
%S 216,260,1146,2848,9945,28434,87119,254174,732978,2062353,5663089,
%T 15156140,39373663,99199976,241889509,570721800,1303028175,2880190406,
%U 6168364480,12813006924,25845550887,50691467373,96800121980,180213143357
%N Number of (n+1)X3 0..3 arrays with rows and columns in nondecreasing order and with no 2X2 subblock sum differing from a horizontal or vertical neighbor subblock sum by more than one
%C Column 2 of A184095
%H R. H. Hardin, <a href="/A184088/b184088.txt">Table of n, a(n) for n = 1..200</a>
%e Some solutions for 4X3
%e ..2..2..3....0..0..1....1..2..2....1..1..3....1..2..2....0..0..1....1..1..2
%e ..2..3..2....0..1..0....3..0..3....1..2..0....2..0..2....0..3..0....1..3..1
%e ..2..3..3....1..0..1....3..0..3....1..2..1....2..1..2....1..0..2....2..0..3
%e ..3..3..1....2..0..1....3..0..3....2..1..2....2..1..2....3..1..3....3..1..3
%e ...
%e ...9.10.......1..2.......6..7.......5..6.......5..6.......3..4.......6..7...
%e ..10.11.......2..2.......6..6.......6..5.......5..5.......4..5.......6..7...
%e ..11.10.......3..2.......6..6.......6..6.......6..6.......5..6.......6..7...
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 09 2011
| 