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A202791
Number of nX4 binary arrays with every one adjacent to another one horizontally, diagonally, antidiagonally or vertically
1
7, 188, 3018, 45519, 702846, 10892633, 168585867, 2608652667, 40368680378, 624709738658, 9667409438049, 149603458151594, 2315118684227671, 35826543150768395, 554417008884929693, 8579622591285149046
OFFSET
1,1
COMMENTS
Column 4 of A202795
LINKS
FORMULA
Empirical: a(n) = 15*a(n-1) -6*a(n-2) +199*a(n-3) +124*a(n-4) -102*a(n-5) +105*a(n-6) -282*a(n-7) -342*a(n-8) +162*a(n-9)
EXAMPLE
Some solutions for n=4
..1..1..0..0....1..1..0..0....1..0..1..1....0..1..1..0....1..1..1..0
..0..0..0..0....1..0..1..1....0..1..1..1....0..0..1..1....0..0..0..1
..0..0..1..0....1..1..0..1....0..0..0..1....1..0..1..1....0..0..1..0
..0..0..1..1....1..0..0..0....0..0..1..1....1..0..1..0....1..1..1..0
CROSSREFS
Sequence in context: A193811 A296234 A219567 * A304859 A303292 A010332
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 24 2011
STATUS
approved