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Number of nX6 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totalling seven exactly once.
1

%I #4 Mar 11 2016 11:43:38

%S 96040,18272616768,1877723928063648,161437591343857507392,

%T 12729704731136074190860176,953623090124975369688224358912,

%U 69055044905731486960323236937432480

%N Number of nX6 0..7 arrays with some element plus some horizontally or vertically adjacent neighbor totalling seven exactly once.

%C Column 6 of A270118.

%H R. H. Hardin, <a href="/A270116/b270116.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A270116/a270116.txt">Empirical recurrence of order 26</a>

%F Empirical recurrence of order 26 (see link above)

%e Some solutions for n=1

%e ..7..0..6..7..1..0. .7..0..2..3..7..7. .2..5..6..0..5..3. .1..7..0..4..7..1

%Y Cf. A270118.

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 11 2016