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A266020 Number of nX3 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors exactly one smaller than itself. 1

%I #4 Dec 20 2015 07:09:38

%S 4,14,33,91,316,1045,3394,11102,36842,122052,402200,1324463,4373322,

%T 14443892,47671729,157325046,519327402,1714258173,5658200079,

%U 18676187387,61646837018,203484164638,671655360694,2216987948652,7317807541625

%N Number of nX3 integer arrays with each element equal to the number of horizontal, vertical and antidiagonal neighbors exactly one smaller than itself.

%C Column 3 of A266025.

%H R. H. Hardin, <a href="/A266020/b266020.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A266020/a266020.txt">Empirical recurrence of order 94</a>

%F Empirical recurrence of order 94 (see link above)

%e Some solutions for n=4

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

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

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

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

%Y Cf. A266025.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 20 2015

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Last modified March 28 12:26 EDT 2024. Contains 371254 sequences. (Running on oeis4.)