A271031 Number of nXnXn triangular 0..5 arrays with some element less than a w, nw or ne neighbor exactly once.

0, 70, 2268, 58036, 1402082, 33505396, 804566180, 19525545192, 479803630966, 11941873574498, 300926010716524, 7672376906432844, 197762508822690802

Offset

1,2

Comments

Column 5 of A271034.

Links

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

Example

Some solutions for n=4
.....1........1........0........0........1........0........0........2
....0.1......1.2......1.2......3.3......1.1......0.4......1.1......0.2
...0.2.2....0.3.4....1.2.4....0.3.3....1.1.2....4.4.4....3.5.5....0.2.3
..3.3.3.4..3.3.5.5..2.2.5.4..0.3.5.5..3.2.3.4..5.5.4.5..1.5.5.5..1.2.4.5

Crossrefs

Cf. A271034.

Sequence in context: A333967 A093757 A163022 * A006437 A067643 A285170

Adjacent sequences: A271028 A271029 A271030 * A271032 A271033 A271034

Keyword

nonn

Author

R. H. Hardin, Mar 29 2016

Status

approved