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A221886
T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal, vertical or antidiagonal neighbor, without consecutive moves in the same direction
4
1, 3, 3, 6, 33, 6, 13, 326, 326, 13, 28, 3223, 11878, 3223, 28, 60, 31832, 449069, 449069, 31832, 60, 129, 314426, 16834526, 65039658, 16834526, 314426, 129, 277, 3105733, 632170065, 9356131846, 9356131846, 632170065, 3105733, 277, 595, 30676867
OFFSET
1,2
COMMENTS
Table starts
...1........3...........6............13............28............60
...3.......33.........326..........3223.........31832........314426
...6......326.......11878........449069......16834526.....632170065
..13.....3223......449069......65039658....9356131846.1347142288446
..28....31832....16834526....9356131846.5123355027782
..60...314426...632170065.1347142288446
.129..3105733.23731120064
.277.30676867
.595
LINKS
EXAMPLE
Some solutions for n=3 k=4
..0..3..0..2....0..3..1..0....0..4..0..0....0..1..1..1....0..2..0..1
..0..4..1..0....0..0..2..0....0..0..0..1....0..1..1..3....1..2..0..2
..1..0..1..0....1..1..2..2....2..1..2..2....3..1..0..0....0..2..1..1
CROSSREFS
Column 1 is A002478
Sequence in context: A221824 A221898 A103895 * A221925 A221688 A366820
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Jan 30 2013
STATUS
approved