A196635 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 1,3,2,0,4 for x=0,1,2,3,4

1, 161, 2716, 61040, 1339251, 29718190, 651323279, 14313363492, 314536084653, 6918341058099, 152091254605720, 3343887108564234, 73523096683740016, 1616580075894214591, 35544361135805663463, 781529666441604010638

Offset

1,2

Comments

Every 0 is next to 0 1's, every 1 is next to 1 3's, every 2 is next to 2 2's, every 3 is next to 3 0's, every 4 is next to 4 4's

Column 7 of A196636

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for n=4
..0..0..3..0..0..3..0....0..3..0..0..2..2..2....0..3..0..2..2..2..2
..0..0..0..0..0..0..0....0..0..0..0..2..0..2....0..0..0..2..0..0..2
..0..0..0..3..3..0..3....3..0..0..0..2..2..2....3..0..0..2..2..0..2
..0..0..3..0..0..3..0....0..3..0..3..0..0..0....0..0..3..0..2..2..2

Crossrefs

Sequence in context: A157337 A200869 A200883 * A196640 A232072 A278205

Adjacent sequences: A196632 A196633 A196634 * A196636 A196637 A196638

Keyword

nonn

Author

R. H. Hardin Oct 04 2011

Status

approved