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A271335
Number of nXnXn triangular 0..3 arrays with new values introduced in sequential zero-upwards order and exactly one upright 2x2x2 triangle having values all equal.
0
0, 1, 36, 12195, 15971570, 71014748334, 1103274718331139, 61125440893226224056, 12230284091550675933621492, 8911161091229971516491937321818, 23780448467408594965822842655206068333
OFFSET
1,3
COMMENTS
Column 3 of A271339.
EXAMPLE
Some solutions for n=4
.....0........0........0........0........0........0........0........0
....0.0......1.0......1.2......1.2......1.2......0.1......1.0......1.0
...1.2.2....1.2.1....3.2.2....0.2.2....3.0.0....2.3.1....2.2.0....2.3.0
..3.1.1.1..3.1.1.1..2.2.0.1..2.3.3.0..1.0.0.3..1.3.1.1..1.0.0.0..2.3.3.0
CROSSREFS
Cf. A271339.
Sequence in context: A141475 A233126 A201003 * A233253 A134374 A263388
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 04 2016
STATUS
approved