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A222841
Number of n X 4 0..3 arrays with no more than floor(n X 4/2) elements equal to at least one horizontal or vertical neighbor, with new values introduced in row major 0..3 order.
1
11, 1585, 326408, 70144361, 15371324917, 3410802057085, 763478480305913, 172013012570239087, 38951066890039501260, 8855947103673731502351, 2020193746874015711217978, 462122926444094400382307495
OFFSET
1,1
COMMENTS
Column 4 of A222842.
LINKS
EXAMPLE
Some solutions for n=3
..0..1..0..2....0..1..0..1....0..1..1..2....0..1..0..2....0..1..0..2
..2..1..2..1....0..0..2..0....0..0..3..1....2..2..1..0....3..1..2..3
..1..0..3..3....1..1..3..1....2..1..0..2....1..2..2..0....1..3..1..2
CROSSREFS
Cf. A222842.
Sequence in context: A076168 A053884 A027880 * A287035 A297004 A308155
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 06 2013
STATUS
approved