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 A199647 T(n,k)=Number of nXk 0..2 arrays with values 0..2 introduced in row major order and each element equal to one or two horizontal and vertical neighbors 8
 0, 1, 1, 1, 3, 1, 2, 13, 13, 2, 3, 60, 112, 60, 3, 6, 288, 1265, 1265, 288, 6, 11, 1384, 12748, 29229, 12748, 1384, 11, 22, 6628, 134748, 658770, 658770, 134748, 6628, 22, 43, 31772, 1396083, 15066222, 32177372, 15066222, 1396083, 31772, 43, 86, 152304 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts ..0......1..........1.............2................3..................6 ..1......3.........13............60..............288...............1384 ..1.....13........112..........1265............12748.............134748 ..2.....60.......1265.........29229...........658770...........15066222 ..3....288......12748........658770.........32177372.........1614250077 ..6...1384.....134748......15066222.......1614250077.......176701683386 .11...6628....1396083.....342328663......80053957248.....19161971644783 .22..31772...14584050....7797114144....3988024796446...2085499380111100 .43.152304..151837464..177447181083..198328767139736.226676302441401393 .86.730036.1582988477.4039488090307.9869645990489747 LINKS R. H. Hardin, Table of n, a(n) for n = 1..112 EXAMPLE Some solutions for n=5 k=3 ..0..0..0....0..1..1....0..0..1....0..0..1....0..1..1....0..1..1....0..0..0 ..1..1..0....0..2..2....2..2..1....0..1..1....0..0..1....0..2..2....1..2..2 ..0..0..2....1..0..2....0..0..2....1..2..2....2..1..1....0..0..2....1..2..0 ..0..1..2....1..0..0....1..1..2....1..2..1....2..2..0....2..1..1....1..1..0 ..0..1..1....2..2..2....2..2..2....2..2..1....0..0..0....2..1..1....2..2..0 CROSSREFS Column 1 is A005578(n-2) Sequence in context: A254630 A145463 A144107 * A199149 A198669 A171059 Adjacent sequences: A199644 A199645 A199646 * A199648 A199649 A199650 KEYWORD nonn,tabl AUTHOR R. H. Hardin Nov 08 2011 STATUS approved

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Last modified March 23 00:55 EDT 2023. Contains 361434 sequences. (Running on oeis4.)