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A221429 T(n,k)=Number of nXk arrays of occupancy after each element moves to some horizontal or vertical neighbor, without consecutive moves in the same direction 5
0, 1, 1, 0, 9, 0, 1, 42, 42, 1, 0, 217, 236, 217, 0, 1, 1116, 4390, 4390, 1116, 1, 0, 5722, 46288, 194879, 46288, 5722, 0, 1, 29383, 622615, 6688747, 6688747, 622615, 29383, 1, 0, 150821, 7432234, 250167826, 594252456, 250167826, 7432234, 150821, 0, 1 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

.0......1........0..........1...........0...........1.............0

.1......9.......42........217........1116........5722.........29383

.0.....42......236.......4390.......46288......622615.......7432234

.1....217.....4390.....194879.....6688747...250167826....9077677881

.0...1116....46288....6688747...594252456.63104234772.6231370575592

.1...5722...622615..250167826.63104234772

.0..29383..7432234.9077677881

.1.150821.93888241

.0.774219

.1

LINKS

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

EXAMPLE

Some solutions for n=3 k=4

..2..0..2..0....1..1..1..0....1..0..0..1....1..0..0..0....1..0..1..1

..1..0..2..1....0..1..2..0....3..2..2..3....3..1..3..2....1..1..1..1

..1..1..0..2....2..2..1..1....0..0..0..0....1..0..1..0....1..1..1..2

CROSSREFS

Sequence in context: A310000 A199284 A189186 * A221507 A089481 A188593

Adjacent sequences:  A221426 A221427 A221428 * A221430 A221431 A221432

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 15 2013

STATUS

approved

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Last modified February 28 01:24 EST 2020. Contains 332319 sequences. (Running on oeis4.)