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A199350
Number of nX1 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors
1
1, 1, 1, 1, 10, 45, 105, 105, 1155, 5505, 13080, 12861, 154461, 769156, 1854541, 1809031, 22802779, 116526114, 283442460, 275058672, 3579775668, 18616654026, 45557997404, 44051920784, 586402520543, 3088257174951, 7590707929300
OFFSET
1,5
COMMENTS
Column 1 of A199356
LINKS
EXAMPLE
Some solutions for n=7
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....0....1....1....0....1....1....1....1....1....1....1....0....1....1
..2....0....1....2....2....1....2....0....2....1....2....1....0....1....2....2
..0....2....1....3....2....2....0....2....1....2....1....0....1....1....1....3
..3....2....2....3....0....2....3....3....0....3....3....2....2....2....2....2
..1....1....2....0....1....1....2....1....3....2....2....2....2....3....0....1
..2....3....3....2....3....3....1....2....2....0....0....3....3....3....3....3
CROSSREFS
Sequence in context: A292611 A275623 A245871 * A199516 A001488 A009540
KEYWORD
nonn
AUTHOR
R. H. Hardin Nov 05 2011
STATUS
approved