A271030 Number of nXnXn triangular 0..4 arrays with some element less than a w, nw or ne neighbor exactly once.

0, 40, 896, 15116, 232432, 3441072, 50108414, 724727082, 10461499634, 151103449566, 2186779416368, 31731721875678, 461837305110082, 6742912667242640, 98757904224890770, 1450886824492563414

Offset

1,2

Comments

Column 4 of A271034.

Links

Table of n, a(n) for n=1..16.

Example

Some solutions for n=4
.....0........2........0........0........0........1........2........0
....0.0......2.4......0.1......0.0......0.2......1.4......0.2......0.0
...0.2.3....0.4.4....1.1.1....1.1.2....3.3.3....1.2.4....0.2.4....2.3.0
..2.4.3.4..0.4.4.4..2.3.1.3..3.1.3.4..4.3.3.3..2.3.4.4..0.4.4.4..2.3.4.4

Crossrefs

Cf. A271034.

Sequence in context: A250986 A190825 A054340 * A013350 A013346 A013348

Adjacent sequences: A271027 A271028 A271029 * A271031 A271032 A271033

Keyword

nonn

Author

R. H. Hardin, Mar 29 2016

Status

approved