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 A201273 Number of n X 4 0..2 arrays with every row and column nondecreasing rightwards and downwards, and the number of instances of each value within one of each other. 2
 1, 3, 12, 14, 85, 199, 143, 740, 1274, 759, 3416, 5312, 2746, 11628, 16676, 7946, 32164, 43438, 19713, 76321, 99347, 43137, 162566, 205231, 86351, 318364, 391600, 161089, 581578, 702330, 282904, 1006014, 1195239, 473473, 1662549, 1947164, 761467, 2641053, 3058967 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..10000 (terms n = 1..192 from R. H. Hardin) FORMULA a(n) = a(n-3) +2*a(n-6) +a(n-9) -4*a(n-12) -5*a(n-15) +4*a(n-18) +5*a(n-21) +a(n-24) -6*a(n-27) +6*a(n-33) -a(n-36) -5*a(n-39) -4*a(n-42) +5*a(n-45) +4*a(n-48) -a(n-51) -2*a(n-54) -a(n-57) +a(n-60). EXAMPLE Some solutions for n=5 ..0..0..0..1....0..0..0..2....0..0..0..0....0..0..0..1....0..0..1..1 ..0..0..1..1....0..1..1..2....0..0..1..1....0..0..1..2....0..0..1..1 ..0..0..1..2....0..1..1..2....0..1..2..2....0..1..2..2....0..0..2..2 ..1..1..2..2....0..1..2..2....1..1..2..2....0..1..2..2....0..1..2..2 ..2..2..2..2....0..1..2..2....1..1..2..2....1..1..2..2....1..1..2..2 CROSSREFS Column 4 of A201277. Sequence in context: A032918 A039945 A227302 * A221920 A349663 A188549 Adjacent sequences: A201270 A201271 A201272 * A201274 A201275 A201276 KEYWORD nonn,easy AUTHOR R. H. Hardin, Nov 29 2011 EXTENSIONS a(0)=1 prepended by Alois P. Heinz, Mar 18 2024 STATUS approved

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Last modified September 10 21:37 EDT 2024. Contains 375795 sequences. (Running on oeis4.)