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A278276 Number of nX4 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero. 1

%I

%S 0,13,122,1461,16842,196726,2293193,26748095,311952675,3638315600,

%T 42433460041,494899976008,5771998528706,67318594537535,

%U 785134131756525,9156988685842075,106797600929943552,1245576243371149125

%N Number of nX4 0..1 arrays with every element both equal and not equal to some elements at offset (-1,-1) (-1,0) (-1,1) (0,-1) (0,1) or (1,0), with upper left element zero.

%C Column 4 of A278280.

%H R. H. Hardin, <a href="/A278276/b278276.txt">Table of n, a(n) for n = 1..210</a>

%F Empirical: a(n) = 10*a(n-1) +30*a(n-2) -106*a(n-3) -241*a(n-4) +350*a(n-5) +671*a(n-6) -325*a(n-7) +128*a(n-8) -1128*a(n-9) -1075*a(n-10) +524*a(n-11) -119*a(n-12) +331*a(n-13) +274*a(n-14) -179*a(n-15) +42*a(n-16) -6*a(n-17) for n>19

%e Some solutions for n=4

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

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

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

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

%Y Cf. A278280.

%K nonn

%O 1,2

%A _R. H. Hardin_, Nov 16 2016

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Last modified January 18 00:56 EST 2021. Contains 340249 sequences. (Running on oeis4.)