A200809 - OEIS

A200809

T(n,k)=Number of nXk 0..2 arrays with no average of any element and its diagonal, antidiagonal, horizontal and vertical neighbors equal to one

2, 6, 6, 10, 62, 10, 22, 378, 378, 22, 52, 2758, 4420, 2758, 52, 114, 21028, 70534, 70534, 21028, 114, 260, 152410, 1258392, 2869182, 1258392, 152410, 260, 600, 1123856, 20829336, 133370844, 133370844, 20829336, 1123856, 600, 1374, 8320912

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Table starts

....2........6.........10...........22............52...........114

....6.......62........378.........2758.........21028........152410

...10......378.......4420........70534.......1258392......20829336

...22.....2758......70534......2869182.....133370844....5614238516

...52....21028....1258392....133370844...16571687222.1822875311878

..114...152410...20829336...5614238516.1822875311878

..260..1123856..349133136.241586613760

..600..8320912.5916801764

.1374.61313142

.3162

LINKS

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

EXAMPLE

Some solutions for 5X5

..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0

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

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

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

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

CROSSREFS

Column 1 is A200572

Sequence in context: A083482 A290701 A200579 * A323444 A099027 A306925

Adjacent sequences: A200806 A200807 A200808 * A200810 A200811 A200812

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Nov 22 2011

STATUS

approved