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 A253043 Number of (n+2)X(7+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order 1

%I #4 Dec 26 2014 12:58:40

%S 65765,18180,25184,51292,116466,262728,620736,1399406,3180688,7274744,

%T 16952678,38766416,88375402,204157530,467852370,1079248186,2467421138,

%U 5696126304,12988579062,30127289430,68617375036,158672004024

%N Number of (n+2)X(7+2) 0..3 arrays with every consecutive three elements in every row, column, diagonal and antidiagonal having exactly two distinct values, and new values 0 upwards introduced in row major order

%C Column 7 of A253044

%H R. H. Hardin, <a href="/A253043/b253043.txt">Table of n, a(n) for n = 1..86</a>

%e Some solutions for n=3

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 26 2014

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Last modified August 5 21:27 EDT 2024. Contains 374956 sequences. (Running on oeis4.)