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 A210354 1/4 the number of (n+1) X 8 0..3 arrays with every 2 X 2 subblock having one, two or three distinct clockwise edge differences. 1

%I #7 Jun 26 2022 20:29:10

%S 61005068,410707536246,2669774395715994,17671175952055398322,

%T 116921261170364094516762,774109750788951970050073763,

%U 5125371159957295208758939227336,33936011149482169319138231985042475

%N 1/4 the number of (n+1) X 8 0..3 arrays with every 2 X 2 subblock having one, two or three distinct clockwise edge differences.

%C Column 7 of A210355.

%H R. H. Hardin, <a href="/A210354/b210354.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A210355.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 20 2012

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Last modified December 8 23:37 EST 2023. Contains 367681 sequences. (Running on oeis4.)