A270507 Number of nXnXn triangular 0..5 arrays with some element plus some adjacent element totalling 5+1 exactly once.

0, 63, 15843, 12034134, 32485734273, 332450685760224, 13296639688401609639, 2115028619259161467213251, 1352556634467191218705760776023

Offset

1,2

Comments

Column 5 of A270509.

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=3
....2......0......4......3......5......3......3......1......1......0......0
...1.0....2.3....3.5....5.4....5.3....4.3....2.5....1.2....0.2....5.0....2.0
..2.4.4..1.4.5..1.5.5..5.2.1..4.5.3..4.4.0..5.4.4..4.3.3..2.5.1..3.3.1..1.4.5

Crossrefs

Cf. A270509.

Sequence in context: A183525 A279043 A234629 * A289875 A062208 A132594

Adjacent sequences: A270504 A270505 A270506 * A270508 A270509 A270510

Keyword

nonn

Author

R. H. Hardin, Mar 18 2016

Status

approved