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A271336 Number of nXnXn triangular 0..4 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal. 0

%I #3 Apr 04 2016 13:41:39

%S 0,1,36,18054,71737645,1362466441524,116575962939900339,

%T 45581482786366761792674,82453748433709497031355883570

%N Number of nXnXn triangular 0..4 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.

%C Column 4 of A271339.

%e Some solutions for n=4

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

%e ....1.0......0.0......1.0......1.2......1.2......0.0......1.2......1.2

%e ...1.1.2....1.1.1....1.1.2....3.3.1....3.3.2....1.2.2....0.0.2....3.1.1

%e ..2.1.0.2..2.3.4.3..3.1.3.1..1.4.1.1..3.3.1.1..1.3.4.0..0.3.2.2..3.3.3.1

%Y Cf. A271339.

%K nonn

%O 1,3

%A _R. H. Hardin_, Apr 04 2016

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