A270253 Number of nXnXn triangular 0..4 arrays with some element plus some adjacent element totalling 4 exactly once.

0, 48, 4428, 772056, 308256072, 302595682944, 754152642763392, 4862374937595546552, 82021185773371226061000, 3647082581376581705719431936, 429702824583695959664255858960088

Offset

1,2

Comments

Column 4 of A270256.

Links

Table of n, a(n) for n=1..11.

Example

Some solutions for n=3
....4......2......1......0......2......3......0......2......2......4......3
...4.1....3.2....2.0....0.1....4.2....1.0....1.1....4.1....0.2....1.0....4.2
..2.3.2..3.4.3..2.1.2..4.2.4..1.4.1..0.1.2..4.2.2..1.0.2..2.3.0..0.1.0..4.2.0

Crossrefs

Cf. A270256.

Sequence in context: A053060 A004034 A134164 * A098209 A208793 A174755

Adjacent sequences: A270250 A270251 A270252 * A270254 A270255 A270256

Keyword

nonn

Author

R. H. Hardin, Mar 14 2016

Status

approved