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A217228
Number of triangular nXnXn arrays of occupancy after each element moves to some neighbor but without 2-loops and with no occupancy greater than 2.
0
0, 1, 26, 1755, 321848, 178829423
OFFSET
1,3
COMMENTS
Column 2 of A217232
EXAMPLE
Some solutions for n=4
.....1........1........1........0........0........0........0........0
....2.1......2.2......2.2......1.2......1.1......1.1......1.2......2.0
...2.0.1....1.1.2....2.1.0....1.1.2....1.2.1....1.1.2....1.1.1....1.1.2
..0.1.1.1..0.1.0.0..1.0.1.0..1.2.0.0..1.0.2.1..1.1.1.1..1.2.1.0..0.1.2.1
CROSSREFS
Sequence in context: A080163 A368852 A300578 * A005644 A123537 A220503
KEYWORD
nonn,hard,more
AUTHOR
R. H. Hardin Sep 28 2012
STATUS
approved