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 A197235 T(n,k)=Number of nXk 0..4 arrays with each element x equal to the number of its horizontal and vertical neighbors equal to 4,3,0,1,2 for x=0,1,2,3,4 8
 1, 1, 1, 2, 7, 2, 3, 12, 12, 3, 5, 31, 55, 31, 5, 8, 79, 242, 242, 79, 8, 13, 186, 1178, 2117, 1178, 186, 13, 21, 465, 5355, 17759, 17759, 5355, 465, 21, 34, 1131, 24723, 141210, 249929, 141210, 24723, 1131, 34, 55, 2776, 116440, 1207249, 3710070, 3710070 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,4 COMMENTS Every 0 is next to 0 4's, every 1 is next to 1 3's, every 2 is next to 2 0's, every 3 is next to 3 1's, every 4 is next to 4 2's Table starts ..1....1.......2.........3............5..............8................13 ..1....7......12........31...........79............186...............465 ..2...12......55.......242.........1178...........5355.............24723 ..3...31.....242......2117........17759.........141210...........1207249 ..5...79....1178.....17759.......249929........3710070..........56349129 ..8..186....5355....141210......3710070.......98514881........2633810897 .13..465...24723...1207249.....56349129.....2633810897......126615582841 .21.1131..116440..10193669....835898389....70009757794.....6025045947229 .34.2776..545287..85161702..12424253226..1862777323325...285872930194581 .55.6803.2548432.716691651.185170942121.49566883751088.13601246931224843 LINKS R. H. Hardin, Table of n, a(n) for n = 1..144 EXAMPLE Some solutions for n=6 k=4 ..0..1..3..1....0..1..3..1....0..2..0..0....0..0..2..0....0..0..2..0 ..0..2..1..0....0..1..1..0....0..2..0..1....0..0..1..0....2..1..3..1 ..2..0..2..0....2..3..1..0....0..2..1..3....0..1..3..2....0..0..1..0 ..1..1..3..1....0..1..1..0....1..0..2..1....2..0..1..0....0..0..0..2 ..3..1..1..0....0..2..3..1....3..1..0..0....1..3..1..0....2..2..0..2 ..1..0..0..2....0..0..1..0....1..0..0..2....0..1..0..0....0..2..0..0 CROSSREFS Column 1 is A000045 Sequence in context: A197896 A198013 A198155 * A197750 A197098 A196802 Adjacent sequences:  A197232 A197233 A197234 * A197236 A197237 A197238 KEYWORD nonn,tabl AUTHOR R. H. Hardin Oct 12 2011 STATUS approved

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Last modified March 26 22:42 EDT 2019. Contains 321565 sequences. (Running on oeis4.)