A220935 T(n,k)=Equals two maps: number of nXk binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..2 nXk array.

1, 1, 1, 2, 4, 1, 4, 16, 12, 1, 7, 52, 92, 37, 1, 12, 200, 673, 556, 114, 1, 21, 792, 5912, 9107, 3332, 351, 1, 37, 3080, 48212, 172904, 123958, 19996, 1081, 1, 65, 12164, 395844, 2876430, 4983202, 1686304, 119972, 3329, 1, 114, 47827, 3232729, 49406891

Offset: 1

Author

R. H. Hardin Dec 25 2012

Keywords

• nonn
• tabl

Comments

Table starts

.1....1......2.......4.......7......12.......21......37....65.114

.1....4.....16......52.....200.....792.....3080...12164.47827

.1...12.....92.....673....5912...48212...395844.3232729

.1...37....556....9107..172904.2876430.49406891

.1..114...3332..123958.4983202

.1..351..19996.1686304

.1.1081.119972

.1.3329

.1

Examples

			Some solutions for n=3 k=4
..0..0..1..1....0..0..1..1....0..0..0..1....0..0..0..1....0..1..0..1
..0..1..1..0....0..1..1..1....1..0..1..1....0..0..0..1....0..0..0..1
..1..1..0..0....0..0..0..0....0..0..0..0....1..0..1..0....1..0..0..0
		

Crossrefs

Column 2 is A099098

Row 1 is A005251(n+1)