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A205168 Number of (n+1) X 7 0..3 arrays with every 2 X 2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..3 introduced in row major order. 1

%I #7 Sep 25 2023 22:41:13

%S 7594479,84495589507,940186880752830,10461512493459648399,

%T 116405840403665540209755,1295254361100907855849613402,

%U 14412368435597398387437153667773,160367237634205038100384071460748125

%N Number of (n+1) X 7 0..3 arrays with every 2 X 2 subblock having unequal diagonal elements or unequal antidiagonal elements, and new values 0..3 introduced in row major order.

%C Column 6 of A205170.

%H R. H. Hardin, <a href="/A205168/b205168.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%Y Cf. A205170.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 22 2012

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Last modified April 19 15:11 EDT 2024. Contains 371794 sequences. (Running on oeis4.)