A221666 T(n,k)=Sum of neighbor maps: number of nXk binary arrays indicating the locations of corresponding elements equal to the sum mod 3 of their horizontal, diagonal and antidiagonal neighbors in a random 0..2 nXk array.

2, 2, 4, 8, 12, 8, 16, 64, 48, 16, 24, 256, 512, 256, 32, 64, 992, 3772, 3772, 856, 64, 128, 4096, 31744, 63200, 32768, 4096, 128, 232, 16384, 262144, 1048576, 1048576, 262144, 15872, 256, 512, 65344, 2097152, 16777216, 33421056, 16777216, 2097152, 65344

Offset: 1

Author

R. H. Hardin Jan 21 2013

Keywords

• nonn
• tabl

Comments

Table starts

....2......2........8........16.........24.........64.......128........232

....4.....12.......64.......256........992.......4096.....16384......65344

....8.....48......512......3772......31744.....262144...2097152...16728064

...16....256.....3772.....63200....1048576...16777216.268281856.4294967296

...32....856....32768...1048576...33421056.1073741824

...64...4096...262144..16777216.1073741824

..128..15872..2097152.268281856

..256..65344.16777216

..512.259584

.1024

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..59

Crossrefs

Column 1 is A000079

Row 1 is A220172