A220805 T(n,k)=Sum of neighbor maps: number of nXk binary arrays indicating the locations of corresponding elements equal to the sum mod 4 of their horizontal and vertical neighbors in a random 0..3 nXk array.

2, 2, 2, 8, 16, 8, 16, 48, 48, 16, 24, 256, 512, 256, 24, 64, 928, 4096, 4096, 928, 64, 128, 4096, 30766, 62648, 30766, 4096, 128, 232, 15820, 262144, 1048576, 1048576, 262144, 15820, 232, 512, 65536, 2097152, 16777216, 33358976, 16777216, 2097152, 65536

Offset: 1

Author

R. H. Hardin Dec 21 2012

Keywords

• nonn
• tabl

Comments

Table starts

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

....2.....16.......48.......256........928.......4096.......15820......65536

....8.....48......512......4096......30766.....262144.....2097152...16728064

...16....256.....4096.....62648....1048576...16777216...268435456.4294967296

...24....928....30766...1048576...33358976.1073741824.34348186888

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

..128..15820..2097152.268435456

..232..65536.16728064

..512.259584

.1024

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..60

Crossrefs

Column 1 is A220172