A197647 Number of nX7 0..4 arrays with each element x equal to the number its horizontal and vertical neighbors equal to 4,2,2,0,2 for x=0,1,2,3,4

1, 595, 49381, 2579814, 132750533, 8248011722, 520354155777, 31036479268872, 1833924613834652, 110108685283374089, 6627651690554026076, 397036343653590941942, 23779305335775072682285, 1426718261217475342798545

Offset

1,2

Comments

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

Column 7 of A197648

Links

R. H. Hardin, Table of n, a(n) for n = 1..109

Example

Some solutions containing all values 0 to 4 for n=4
..0..0..0..0..2..2..2....0..0..3..0..2..2..2....0..0..0..1..2..2..2
..0..3..0..0..2..4..2....0..3..0..1..2..4..2....0..0..3..0..2..4..2
..2..2..0..1..2..2..2....0..3..0..1..2..2..2....2..2..1..1..2..2..2
..2..2..0..0..1..0..0....0..0..0..0..1..0..1....2..2..1..0..0..1..1

Crossrefs

Sequence in context: A241876 A252534 A249705 * A321012 A238034 A293098

Adjacent sequences: A197644 A197645 A197646 * A197648 A197649 A197650

Keyword

nonn

Author

R. H. Hardin Oct 16 2011

Status

approved