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 A196017 T(n,k)=Number of nXk 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors within one of itself 8
 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 7, 7, 3, 1, 1, 5, 13, 25, 13, 5, 1, 1, 9, 16, 27, 27, 16, 9, 1, 1, 17, 32, 91, 106, 91, 32, 17, 1, 1, 31, 65, 231, 316, 316, 231, 65, 31, 1, 1, 57, 125, 455, 835, 708, 835, 455, 125, 57, 1, 1, 105, 211, 1135, 2350, 3572, 3572, 2350 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,13 COMMENTS Table starts .1..1...1....1.....1......1.......1........1.........1..........1...........1 .1..1...1....1.....3......5.......9.......17........31.........57.........105 .1..1...2....7....13.....16......32.......65.......125........211.........390 .1..1...7...25....27.....91.....231......455......1135.......2693........6041 .1..3..13...27...106....316.....835.....2350......7232......21846.......63985 .1..5..16...91...316....708....3572....14607.....54710.....196832......782926 .1..9..32..231...835...3572...22711...100094....517009....2740712....14291156 .1.17..65..455..2350..14607..100094...670449...4760391...32900243...226381615 .1.31.125.1135..7232..54710..517009..4760391..44864449..411748723..3838635775 .1.57.211.2693.21846.196832.2740712.32900243.411748723.5122273171.64922269000 LINKS R. H. Hardin, Table of n, a(n) for n = 1..312 EXAMPLE Some solutions for n=6 k=4 ..2..2..2..0....2..2..3..2....2..3..3..2....2..2..3..2....0..2..2..2 ..2..0..3..2....2..0..3..3....3..4..3..3....2..0..3..3....2..3..0..2 ..3..3..3..3....3..3..3..3....3..3..0..2....3..3..4..3....3..4..3..3 ..3..2..0..2....3..2..0..2....3..4..3..3....3..4..4..3....3..3..4..3 ..2..0..2..2....2..0..2..2....3..4..4..3....3..4..4..3....2..0..3..3 ..2..2..2..0....2..2..2..0....2..3..3..2....2..3..3..2....2..2..3..2 CROSSREFS Column 2 is A000213(n-2) Sequence in context: A296526 A259844 A112707 * A343555 A251660 A279453 Adjacent sequences: A196014 A196015 A196016 * A196018 A196019 A196020 KEYWORD nonn,tabl AUTHOR R. H. Hardin Sep 26 2011 STATUS approved

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Last modified March 20 18:56 EDT 2023. Contains 361391 sequences. (Running on oeis4.)