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 A203346 T(n,k)=Number of nXk 0..4 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 8
 1, 1, 1, 1, 5, 1, 1, 25, 25, 1, 1, 95, 635, 95, 1, 1, 425, 9555, 9555, 425, 1, 1, 2329, 142167, 503409, 142167, 2329, 1, 1, 12487, 2566719, 23912553, 23912553, 2566719, 12487, 1, 1, 64444, 48091042, 1288066857, 3742207236, 1288066857, 48091042, 64444, 1, 1 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,5 COMMENTS Table starts .1.....1.........1.............1.................1..................1 .1.....5........25............95...............425...............2329 .1....25.......635..........9555............142167............2566719 .1....95......9555........503409..........23912553.........1288066857 .1...425....142167......23912553........3742207236.......643689050030 .1..2329...2566719....1288066857......643689050030....360171255368417 .1.12487..48091042...72606563663...112737045408576.202012748290560363 .1.64444.870803077.4048732987777.19611990609779478 LINKS R. H. Hardin, Table of n, a(n) for n = 1..84 EXAMPLE Some solutions for n=5 k=3 ..2..3..3....0..0..0....4..4..0....2..2..0....4..4..3....3..3..2....2..4..4 ..2..4..4....2..2..0....4..4..2....2..4..4....4..4..3....3..3..2....3..4..4 ..1..4..4....4..4..0....0..3..2....1..4..4....4..2..1....4..4..3....3..3..2 ..0..4..4....4..4..2....4..4..4....0..1..1....4..4..4....4..4..4....2..2..0 ..0..2..2....2..2..2....4..4..4....0..0..0....0..4..4....1..4..4....0..0..0 CROSSREFS Sequence in context: A156600 A329118 A152572 * A176793 A118190 A172342 Adjacent sequences:  A203343 A203344 A203345 * A203347 A203348 A203349 KEYWORD nonn,tabl AUTHOR R. H. Hardin Dec 31 2011 STATUS approved

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Last modified May 19 15:03 EDT 2022. Contains 353834 sequences. (Running on oeis4.)