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A253484 Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically 1

%I #4 Jan 02 2015 10:25:39

%S 3888,85280,1962374,44878810,1028601406,23553719782,539599344188,

%T 12359428902608,283115374994698,6485039906571714,148548569346340394,

%U 3402684107566122626,77942770831566300150,1785375804378076728772

%N Number of (3+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically

%C Row 3 of A253482

%H R. H. Hardin, <a href="/A253484/b253484.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 02 2015

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Last modified March 29 02:23 EDT 2024. Contains 371264 sequences. (Running on oeis4.)