A234864 - OEIS

A234864

Number of (n+2) X (3+2) 0..3 arrays with each 3 X 3 subblock having the sum of its 72 absolute element differences equal to 52, and no adjacent elements equal.

%I #6 Sep 25 2023 23:01:06

%S 61954,272878,1241772,6113796,33431812,192846644,1129155378,

%T 6882784048,43546591390,271469433824,1733428722048,11349225086910,

%U 72370907554790,470247936237146,3116595409983744,20033051082617520,130971235426879114

%N Number of (n+2) X (3+2) 0..3 arrays with each 3 X 3 subblock having the sum of its 72 absolute element differences equal to 52, and no adjacent elements equal.

%C Column 3 of A234867.

%H R. H. Hardin, <a href="/A234864/b234864.txt">Table of n, a(n) for n = 1..104</a>

%e Some solutions for n=1

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

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

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

%Y Cf. A234867.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 01 2014