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 A199356 T(n,k)=Number of nXk 0..3 arrays with values 0..3 introduced in row major order, the number of instances of each value within one of each other, and every element equal to zero or one horizontal or vertical neighbors 7
 1, 1, 1, 1, 1, 1, 1, 45, 45, 1, 10, 105, 930, 105, 10, 45, 4251, 7945, 7945, 4251, 45, 105, 9175, 808721, 705263, 808721, 9175, 105, 105, 447916, 36379420, 66367192, 66367192, 36379420, 447916, 105, 1155, 958259, 821116806, 6518500460 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,8 COMMENTS Table starts ....1........1..........1............1.............10.............45 ....1........1.........45..........105...........4251...........9175 ....1.......45........930.........7945.........808721.......36379420 ....1......105.......7945.......705263.......66367192.....6518500460 ...10.....4251.....808721.....66367192....71245512532.32990481786550 ...45.....9175...36379420...6518500460.32990481786550 ..105...447916..821116806.661357976129 ..105...958259.7583425311 .1155.50233308 .5505 LINKS R. H. Hardin, Table of n, a(n) for n = 1..59 EXAMPLE Some solutions for n=3 k=3 ..0..1..1....0..1..2....0..1..2....0..1..1....0..0..1....0..0..1....0..1..2 ..2..2..0....3..1..0....1..2..3....2..0..3....2..3..2....2..2..3....2..1..3 ..0..3..3....2..3..1....0..1..3....3..1..2....3..1..0....3..3..1....2..0..3 CROSSREFS Sequence in context: A087083 A216407 A137439 * A199523 A119415 A165866 Adjacent sequences:  A199353 A199354 A199355 * A199357 A199358 A199359 KEYWORD nonn,tabl AUTHOR R. H. Hardin Nov 05 2011 STATUS approved

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Last modified December 4 19:40 EST 2021. Contains 349526 sequences. (Running on oeis4.)