A270260 Number of 5X5X5 triangular 0..n arrays with some element plus some adjacent element totalling n exactly once.

0, 3612, 3280968, 308256072, 12712991544, 233617868244, 2749271140656, 22371873866256, 139822582266000, 711923728070220, 3052254429614520, 11503596191487192, 38443036761706248, 117645141262704132

Offset

1,2

Comments

Row 5 of A270256.

Links

R. H. Hardin, Table of n, a(n) for n = 1..25

Example

Some solutions for n=2
......1..........2..........1..........2..........1..........1..........2
.....2.1........1.2........2.2........2.2........0.0........0.0........2.2
....2.2.2......2.2.2......2.2.2......2.1.2......0.1.0......0.0.0......1.2.2
...2.2.2.1....1.2.2.2....1.2.2.1....2.2.2.1....1.0.0.1....0.1.1.0....2.2.2.2
..2.2.2.2.2..1.2.1.2.2..2.2.1.0.0..2.1.2.2.1..2.1.0.0.0..1.0.0.0.0..2.1.1.2.2

Crossrefs

Cf. A270256.

Sequence in context: A031558 A045817 A107538 * A106433 A188309 A185495

Adjacent sequences: A270257 A270258 A270259 * A270261 A270262 A270263

Keyword

nonn

Author

R. H. Hardin, Mar 14 2016

Status

approved