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A240772
Number of n X 4 0..3 arrays with no element equal to exactly one horizontal or vertical neighbor, with new values 0..3 introduced in row major order.
1
5, 196, 8319, 357943, 15484811, 671539712, 29164866719, 1267677501494, 55127359226486, 2397991057304305, 104327512613317759, 4539326052824027843, 197518541157705375152, 8594849725702241760851, 374004476219684412455327
OFFSET
1,1
COMMENTS
Column 4 of A240774.
LINKS
EXAMPLE
Some solutions for n=3
..0..1..0..1....0..1..2..0....0..1..0..2....0..1..0..2....0..1..0..2
..2..3..3..2....3..2..3..2....3..0..3..0....2..0..3..1....2..0..3..1
..0..3..3..0....1..3..0..3....0..3..0..1....1..2..0..3....1..3..1..3
CROSSREFS
Cf. A240774.
Sequence in context: A194573 A194574 A194575 * A142927 A114351 A296172
KEYWORD
nonn
AUTHOR
R. H. Hardin, Apr 12 2014
STATUS
approved