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 A237939 Number of (n+1)X(2+1) 0..2 arrays with the maximum minus the minimum of every 2X2 subblock equal 1
 437, 5519, 70435, 946063, 12909207, 178348911, 2478121687, 34547541807, 482441897847, 6743242294207, 94297236738151, 1318980922040111, 18451660550452439, 258144363280637727, 3611650688217168775 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A237945 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 20*a(n-1) -56*a(n-2) -524*a(n-3) +1719*a(n-4) +2496*a(n-5) -12490*a(n-6) +8016*a(n-7) +10172*a(n-8) -11936*a(n-9) +1560*a(n-10) +1344*a(n-11) -320*a(n-12) EXAMPLE Some solutions for n=3 ..2..0..2....2..0..0....2..1..0....1..2..0....2..1..1....2..2..1....1..0..1 ..1..0..2....2..2..2....0..0..2....0..1..2....1..0..2....1..2..2....1..1..1 ..2..2..2....2..0..1....0..2..0....2..0..1....0..2..0....1..1..1....2..2..2 ..2..0..2....1..1..2....1..0..2....1..2..1....2..0..1....1..0..1....1..1..1 CROSSREFS Sequence in context: A216988 A190828 A084293 * A088893 A043447 A006911 Adjacent sequences: A237936 A237937 A237938 * A237940 A237941 A237942 KEYWORD nonn AUTHOR R. H. Hardin, Feb 16 2014 STATUS approved

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Last modified March 26 02:36 EDT 2023. Contains 361529 sequences. (Running on oeis4.)