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A196016 Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself 1

%I #5 Mar 31 2012 12:36:25

%S 1,9,32,231,835,3572,22711,100094,517009,2740712,14291156,72486659,

%T 375604408,1948549100,10070403094,52010772351,269069912146,

%U 1391421035119,7193724490586,37198028475134,192356730926735,994618459574872

%N Number of nX7 0..4 arrays with each element equal to the number its horizontal and vertical neighbors within one of itself

%C Column 7 of A196017

%H R. H. Hardin, <a href="/A196016/b196016.txt">Table of n, a(n) for n = 1..226</a>

%e Some solutions for n=4

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

%e ..3..3..4..4..3..0..2....2..0..2..3..0..2..3....3..3..4..4..4..3..3

%e ..2..0..3..4..4..3..3....3..2..0..3..2..0..2....2..0..3..3..3..0..2

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

%K nonn

%O 1,2

%A _R. H. Hardin_ Sep 26 2011

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)