A270610 Number of 5X5X5 triangular 0..n arrays with some element plus some adjacent element totalling n+1 or n-1 exactly once.

0, 0, 443088, 46957788, 1008327378, 25162747992, 271906503420, 2992465755612, 20367499465482, 129329174634672, 624840436639956, 2766099092355012, 10373656913823810, 35810603737855596, 111074891756040534

Offset

1,3

Comments

Row 5 of A270606.

Links

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

Example

Some solutions for n=3
......0..........0..........0..........0..........2..........0..........0
.....0.3........0.0........2.3........0.0........0.3........0.0........0.3
....0.0.3......3.0.0......3.3.3......3.0.0......0.3.3......1.0.3......0.0.3
...0.0.3.2....0.3.3.1....3.3.2.3....3.0.1.0....3.3.3.3....3.0.3.2....0.3.0.0
..3.0.3.2.1..0.3.3.0.0..0.0.3.3.0..3.0.0.3.0..0.3.3.3.2..2.3.3.3.3..3.3.0.3.1

Crossrefs

Cf. A270606.

Sequence in context: A287581 A230084 A250839 * A224634 A251349 A210307

Adjacent sequences: A270607 A270608 A270609 * A270611 A270612 A270613

Keyword

nonn

Author

R. H. Hardin, Mar 20 2016

Status

approved