A196925 - OEIS

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

1, 1, 2, 7, 65, 1242, 55546, 5603265, 1280956817, 661075536443, 771059112373171, 2031433178217758354

(list; graph; refs; listen; history; text; internal format)

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

LINKS

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

KEYWORD

nonn

AUTHOR

STATUS

approved