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A207354 Number of n X 4 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically. 1

%I

%S 69,4761,244134,12218660,607211313,30147535858,1498532240063,

%T 74502855991182,3704761167895267,184230472617367825,

%U 9161522306169565926,455590132335964207843,22655874527055217183480,1126645426342829794990441

%N Number of n X 4 0..2 arrays avoiding the pattern z+1 z+1 z horizontally and z-1 z-1 z vertically.

%C Column 4 of A207358.

%H R. H. Hardin, <a href="/A207354/b207354.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A207358.

%K nonn

%O 1,1

%A _R. H. Hardin_, Feb 17 2012

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Last modified January 31 11:03 EST 2023. Contains 359971 sequences. (Running on oeis4.)