A267837 - OEIS

A267837

Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast neighbor modulo 4 and the upper left element equal to 0.

%I #6 Aug 12 2016 06:54:16

%S 6,54,924,19696,456052,11169884,284749896,7478180356,200946163564,

%T 5498658652872,152701830225328,4292791741022352,121927662325745128,

%U 3493616278749683152,100864166949775322480,2931337070411050352250

%N Number of 4Xn arrays containing n copies of 0..4-1 with every element equal to or 1 greater than any northeast neighbor modulo 4 and the upper left element equal to 0.

%C Row 4 of A267836.

%H R. H. Hardin, <a href="/A267837/b267837.txt">Table of n, a(n) for n = 1..40</a>

%e Some solutions for n=4

%e ..0..1..2..1....0..2..1..1....0..2..3..1....0..0..1..1....0..3..1..3

%e ..2..3..1..3....2..1..2..3....3..3..1..0....0..1..1..2....0..2..3..1

%e ..0..2..3..0....1..2..0..3....3..2..0..0....2..2..3..3....3..0..1..2

%e ..3..0..1..2....3..0..0..3....2..1..1..2....2..3..3..0....0..2..2..1

%Y Cf. A267836.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 21 2016