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

1,1

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

Links

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

Example

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

Crossrefs

Column 1 is A220172

Sequence in context: A360309 A220254 A220177 * A298647 A068718 A075097

Adjacent sequences: A220802 A220803 A220804 * A220806 A220807 A220808

Keyword

nonn,tabl

Author

R. H. Hardin Dec 21 2012

Status

approved