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 A251065 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having x11-x00 less than x10-x01 14
 50, 222, 336, 867, 2740, 2167, 3123, 17129, 31895, 14180, 10660, 89429, 320950, 379440, 92429, 35064, 410718, 2482824, 6182747, 4499219, 603249, 112373, 1716324, 15857764, 71431719, 119032248, 53420941, 3935721, 353517, 6678657, 87634164 (list; table; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Table starts ......50.......222.........867..........3123..........10660...........35064 .....336......2740.......17129.........89429.........410718.........1716324 ....2167.....31895......320950.......2482824.......15857764........87634164 ...14180....379440.....6182747......71431719......641508138......4755605792 ...92429...4499219...119032248....2062530658....26192388204....262314968432 ..603249..53420941..2295692500...59730054958..1074828860950..14586457826568 .3935721.634161915.44280784440.1731036678270.44184817939580.813777827212550 LINKS R. H. Hardin, Table of n, a(n) for n = 1..180 FORMULA Empirical for column k: k=1: a(n) = 6*a(n-1) +7*a(n-2) -23*a(n-3) -4*a(n-4) +12*a(n-5) k=2: [order 11] k=3: [order 39] Empirical for row n: n=1: a(n) = 9*a(n-1) -31*a(n-2) +51*a(n-3) -40*a(n-4) +12*a(n-5) n=2: [order 12] n=3: [order 21] n=4: [order 27] n=5: [order 33] n=6: [order 39] EXAMPLE Some solutions for n=2 k=4 ..1..2..0..2..2....0..1..2..1..1....0..1..1..1..2....1..2..0..0..2 ..1..0..2..2..2....0..1..0..2..2....0..0..0..0..2....0..0..2..2..1 ..0..1..1..1..1....1..0..1..0..0....0..1..2..2..1....0..1..0..0..1 CROSSREFS Column 1 is A184556 Row 1 is A222993(n+1) Sequence in context: A179755 A186843 A250527 * A231087 A235956 A197971 Adjacent sequences:  A251062 A251063 A251064 * A251066 A251067 A251068 KEYWORD nonn,tabl AUTHOR R. H. Hardin, Nov 29 2014 STATUS approved

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Last modified October 20 11:18 EDT 2019. Contains 328257 sequences. (Running on oeis4.)