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 A221937 T(n,k)=Number of nXk arrays of occupancy after each element stays put or moves to some horizontal or antidiagonal neighbor, without move-in move-out straight through or left turns 9
 1, 3, 1, 6, 17, 1, 13, 105, 91, 1, 28, 783, 1599, 489, 1, 60, 5622, 36467, 24535, 2627, 1, 129, 40608, 799632, 1759041, 376389, 14113, 1, 277, 293084, 17595404, 119035112, 84547866, 5773962, 75819, 1, 595, 2115379, 387146025, 8118923949, 17626884659 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Table starts .1........3...........6............13..............28...............60 .1.......17.........105...........783............5622............40608 .1.......91........1599.........36467..........799632.........17595404 .1......489.......24535.......1759041.......119035112.......8118923949 .1.....2627......376389......84547866.....17626884659....3719159201319 .1....14113.....5773962....4065176472...2611330803361.1705064784016177 .1....75819....88575493..195452177326.386840503637732 .1...407321..1358791848.9397301189681 .1..2188243.20844539836 .1.11755857 .1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..71 EXAMPLE Some solutions for n=3 k=4 ..1..1..1..1....0..3..0..1....0..2..3..0....1..1..2..1....1..2..0..1 ..1..1..3..1....1..1..2..1....1..0..0..2....1..0..2..0....0..1..2..1 ..0..0..2..0....1..0..2..0....0..2..2..0....1..2..0..1....2..0..0..2 CROSSREFS Column 2 is A221731 Row 1 is A002478 Sequence in context: A350610 A140982 A100232 * A333652 A189735 A221693 Adjacent sequences:  A221934 A221935 A221936 * A221938 A221939 A221940 KEYWORD nonn,tabl AUTHOR R. H. Hardin Feb 01 2013 STATUS approved

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Last modified January 21 22:03 EST 2022. Contains 350480 sequences. (Running on oeis4.)