login

Reminder: The OEIS is hiring a new managing editor, and the application deadline is January 26.

Number of nXnXn triangular 0..6 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 13:42:23

%S 0,1,36,19788,201709343,26246080066323,26082639397246675725,

%T 173162355470048137511631249

%N Number of nXnXn triangular 0..6 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.

%C Column 6 of A271339.

%e Some solutions for n=4

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

%e ....0.0......1.2......0.0......1.2......1.0......0.1......0.0......1.0

%e ...1.2.0....1.1.3....1.1.1....3.1.1....1.1.1....1.2.3....1.2.2....1.0.0

%e ..3.0.0.3..4.0.0.2..2.0.0.2..1.1.1.3..2.2.3.4..2.2.3.3..3.0.3.4..0.0.1.1

%Y Cf. A271339.

%K nonn

%O 1,3

%A _R. H. Hardin_, Apr 04 2016