login
A196925
Number of n X n 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 1,4,3,2,0 for x=0,1,2,3,4
0
1, 1, 2, 7, 65, 1242, 55546, 5603265, 1280956817, 661075536443, 771059112373171, 2031433178217758354
OFFSET
1,3
COMMENTS
Every 0 is next to 0 1's, every 1 is next to 1 4's, every 2 is next to 2 3's, every 3 is next to 3 2's, every 4 is next to 4 0's
Diagonal of A196929
EXAMPLE
Some solutions for n=4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..4..0..0....0..4..0..0....0..0..4..0....0..0..0..0....0..0..0..0
..0..0..0..0....0..0..4..0....0..0..0..0....0..0..4..0....0..0..0..0
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
CROSSREFS
Sequence in context: A179043 A116985 A042051 * A246865 A133237 A099660
KEYWORD
nonn
AUTHOR
R. H. Hardin Oct 07 2011
STATUS
approved