A270846 Number of nXnXn triangular 0..4 arrays with some element plus some adjacent element totalling 4+1, 4 or 4-1 exactly once.

0, 24, 270, 6822, 307494, 27582438, 4875050400, 1706684948076, 1187168873262480, 1644795530084678034, 4547633232372993959010, 25129240595872441326822390, 277850483242555569985827003552, 6153180893083637725825618704418638

Offset

1,2

Comments

Column 4 of A270850.

Links

R. H. Hardin, Table of n, a(n) for n = 1..15

Example

Some solutions for n=4
.....3........0........3........3........1........0........1........1
....4.4......2.2......3.4......4.3......0.0......1.2......0.2......0.0
...3.3.4....4.4.4....4.4.4....4.2.4....1.0.0....0.0.0....0.0.0....0.2.1
..3.4.3.2..2.4.4.2..3.3.2.4..2.4.4.2..1.1.1.2..0.0.1.1..0.2.0.1..0.0.0.1

Crossrefs

Cf. A270850.

Sequence in context: A001413 A022065 A125412 * A187048 A000915 A006665

Adjacent sequences: A270843 A270844 A270845 * A270847 A270848 A270849

Keyword

nonn

Author

R. H. Hardin, Mar 24 2016

Status

approved