A192413 Number of nXnXn triangular binary arrays with every 1 adjacent to at most 4 other 1s

2, 8, 64, 968, 28832, 1671872, 188562024, 41430463144, 17723539378064, 14763059454475880, 23944611669892140680, 75620272070369667245120, 465017414868882102745479712, 5568018952998142584614666404696

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..18

Example

Some solutions for 5X5X5
......0..........0..........1..........1..........0..........1..........1
.....1.0........1.0........0.1........0.1........0.1........0.0........1.0
....1.1.1......1.0.1......0.1.1......1.1.0......0.0.0......1.0.1......1.1.0
...1.0.1.0....0.0.1.0....1.1.0.1....0.0.1.1....1.1.1.1....0.0.1.1....0.0.0.0
..0.0.0.1.1..1.0.0.0.0..0.0.0.0.1..1.1.1.1.1..0.0.1.0.1..1.0.0.1.0..0.0.0.1.0

Crossrefs

Sequence in context: A153569 A153532 A153561 * A194456 A153542 A153570

Adjacent sequences: A192410 A192411 A192412 * A192414 A192415 A192416

Keyword

nonn

Author

R. H. Hardin Jun 30 2011

Status

approved