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A251848 Number of (n+2)X(3+2) 0..3 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime 1

%I #4 Dec 09 2014 17:05:16

%S 15899,138538,2118665,30754863,458278940,6885655911,102820691005,

%T 1537817732274,23014643920979,344244913407821,5149619163538379,

%U 77039622895390388,1152481624217417835,17240694630187128552

%N Number of (n+2)X(3+2) 0..3 arrays with every row, column, diagonal or antidiagonal in each 3X3 subblock summing to a prime

%C Column 3 of A251852

%H R. H. Hardin, <a href="/A251848/b251848.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 09 2014

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Last modified April 23 16:40 EDT 2024. Contains 371916 sequences. (Running on oeis4.)