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 A251831 Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6 1

%I #4 Dec 09 2014 13:17:19

%S 3354,27554,262404,2298772,20314774,182241310,1624862992,14480032642,

%T 129225388882,1152830227806,10283104113928,91735092773142,

%U 818352658155236,7300253070215844,65123717708742520,580952471294611872

%N Number of (n+2)X(2+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 3 4 5 or 6

%C Column 2 of A251836

%H R. H. Hardin, <a href="/A251831/b251831.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A251831/a251831.txt">Empirical recurrence of order 65</a>

%F Empirical recurrence of order 65 (see link above)

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 09 2014

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Last modified June 9 10:32 EDT 2023. Contains 363178 sequences. (Running on oeis4.)