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 A200801 T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors 8
 1, 2, 2, 5, 15, 5, 15, 178, 178, 15, 51, 2614, 9880, 2614, 51, 187, 40148, 583813, 583813, 40148, 187, 715, 622645, 34679839, 132636590, 34679839, 622645, 715, 2795, 9676364, 2060918000, 30147154218, 30147154218, 2060918000, 9676364, 2795 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts .....1...........2.................5......................15 .....2..........15...............178....................2614 .....5.........178..............9880..................583813 ....15........2614............583813...............132636590 ....51.......40148..........34679839.............30147154218 ...187......622645........2060918000...........6852264918471 ...715.....9676364......122478253815........1557479347400065 ..2795...150442627.....7278777317468......354005859128023982 .11051..2339207390...432571571252989....80463441477635545163 .43947.36372631268.25707362563355693.18288865135614195620421 LINKS Ron Hardin, Table of n, a(n) for n = 1..97 EXAMPLE Some solutions for n=5 k=3 ..0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0....0..0..0 ..0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0....0..1..0 ..2..0..0....0..1..1....0..0..2....2..2..0....2..2..0....2..2..0....2..1..2 ..2..3..3....1..0..2....3..1..0....1..1..1....3..2..2....0..0..1....0..1..3 ..2..2..0....3..2..1....3..3..0....2..2..1....3..1..3....1..1..1....1..1..2 CROSSREFS Column 1 is A007581(n-1) Sequence in context: A112709 A208353 A208001 * A208408 A198528 A208466 Adjacent sequences:  A200798 A200799 A200800 * A200802 A200803 A200804 KEYWORD nonn,tabl AUTHOR R. H. Hardin Nov 22 2011 STATUS approved

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