A270855 Number of 6 X 6 X 6 triangular 0..n arrays with some element plus some adjacent element totalling n+1, n or n-1 exactly once.

0, 0, 28440, 27582438, 5805948474, 571228600932, 29999932959600, 1131964246928502, 27738553460278170, 526704152938743948, 7209576736148583840, 80085435443327098104, 700902167873486650002

Offset

1,3

Comments

Row 6 of A270850.

Links

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

Example

Some solutions for n=3
.......0............2............3............3............3............1
......0.1..........3.3..........3.3..........3.3..........3.2..........0.0
.....0.0.1........2.3.3........3.3.2........3.3.3........2.3.3........0.0.1
....0.0.0.0......3.3.3.2......3.2.3.3......3.3.3.2......3.3.3.3......0.0.0.0
...0.0.0.0.1....3.2.3.3.3....3.3.3.3.2....3.3.3.3.3....3.3.3.2.2....0.0.0.1.0
..0.0.0.1.0.0..2.3.3.3.2.2..2.3.2.3.2.3..3.3.3.3.2.2..2.3.2.3.3.3..1.0.0.1.0.0

Crossrefs

Cf. A270850.

Sequence in context: A355712 A266039 A202614 * A250992 A250630 A236595

Adjacent sequences: A270852 A270853 A270854 * A270856 A270857 A270858

Keyword

nonn

Author

R. H. Hardin, Mar 24 2016

Status

approved