A220580 Equals one maps: number of 2Xn binary arrays indicating the locations of corresponding elements equal to exactly one of their horizontal and antidiagonal neighbors in a random 0..1 2Xn array.

1, 8, 21, 115, 371, 1504, 5240, 19904, 71787, 266591, 973703, 3590009, 13161398, 48409054, 177699822, 653013280, 2398088376, 8809799868, 32356803616, 118855121770, 436550962678, 1603501078153, 5889674104016, 21633105877502

Offset: 1

Author

R. H. Hardin Dec 16 2012

Keywords

• nonn

Comments

Row 2 of A220579

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210