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A196455
Number of n X 7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 3,0,2,4,1 for x=0,1,2,3,4.
1
17, 320, 3966, 76809, 2032584, 46887621, 926499600, 17962317556, 351103877665, 6945098996988, 139065692664815, 2795329197283554, 56072977068447935, 1121420878698363003, 22398808824228997399, 447457890891091698310
OFFSET
1,1
COMMENTS
Every 0 is next to 0 3's, every 1 is next to 1 0's, every 2 is next to 2 2's, every 3 is next to 3 4's, every 4 is next to 4 1's.
Column 7 of A196456.
LINKS
EXAMPLE
Some solutions for n=4
..2..2..2..1..1..1..0....0..1..1..0..0..1..1....0..1..1..0..0..0..0
..2..0..2..0..0..2..2....0..2..2..2..2..2..0....2..2..1..0..0..0..0
..2..2..2..1..1..2..2....0..2..0..0..1..2..0....2..2..1..0..0..2..2
..0..0..0..1..1..0..0....1..2..2..2..2..2..1....0..0..1..1..1..2..2
CROSSREFS
Cf. A196456.
Sequence in context: A331492 A244764 A089571 * A217960 A221583 A091464
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 02 2011
STATUS
approved