login
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
5
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
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
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Dec 21 2012
STATUS
approved