A270252 Number of nXnXn triangular 0..3 arrays with some element plus some adjacent element totalling 3 exactly once.

0, 24, 768, 37848, 3280968, 534438768, 168922341960, 105517892702664, 131753433792113808, 331340420421242860608, 1687124453705206024927056, 17459534608150280430379207968, 368268947135078917128505577185992

Offset

1,2

Comments

Column 3 of A270256.

Links

Table of n, a(n) for n=1..13.

Example

Some solutions for n=4
.....2........3........3........3........3........1........0........2
....2.2......2.0......3.3......3.2......2.3......0.0......3.2......0.2
...3.3.0....2.2.0....1.1.1....0.2.0....3.2.0....2.0.1....2.2.3....0.0.1
..1.1.1.0..2.2.2.2..2.3.1.0..0.0.2.0..2.2.0.0..2.2.2.3..2.3.3.3..2.0.0.1

Crossrefs

Cf. A270256.

Sequence in context: A361661 A269147 A269209 * A275635 A158651 A265884

Adjacent sequences: A270249 A270250 A270251 * A270253 A270254 A270255

Keyword

nonn

Author

R. H. Hardin, Mar 14 2016

Status

approved