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A252454 Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7 1

%I #4 Dec 17 2014 12:45:09

%S 1731,7223,38966,203320,1058050,5596619,29527662,155721485,823647387,

%T 4355427974,23011713271,121620027508,643010695889,3399424543954,

%U 17969865361314,94992368742548,502171830132233,2654727031396843

%N Number of (n+2)X(5+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 0 2 4 6 or 7

%C Column 5 of A252457

%H R. H. Hardin, <a href="/A252454/b252454.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=3

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

%e ..3..3..3..3..3..3..3....1..3..1..1..1..1..1....3..1..1..3..1..1..1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2014

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Last modified April 17 23:23 EDT 2024. Contains 371767 sequences. (Running on oeis4.)