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 A237569 Number of (n+1)X(1+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 1
 256, 1876, 13924, 103264, 769680, 5705156, 42501300, 315065200, 2347267424, 17400203636, 129631996580, 960959725312, 7159191300272, 53070925060004, 395380448791316, 2930946979641872, 21835672557183872, 161867373265982548 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 1 of A237574 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 23*a(n-2) +1473*a(n-4) +15833*a(n-6) +60176*a(n-8) +65344*a(n-10) -70656*a(n-12) -139264*a(n-14) for n>15 EXAMPLE Some solutions for n=4 ..2..3....1..1....2..1....1..1....3..2....2..2....2..2....3..2....3..3....0..2 ..1..1....1..3....3..2....0..3....1..1....2..2....1..1....1..1....0..1....2..1 ..3..3....1..2....1..1....3..2....3..0....1..1....1..3....1..0....1..0....3..2 ..2..0....0..1....1..0....2..0....1..0....3..1....0..0....0..3....0..0....0..1 ..2..2....3..0....2..3....1..0....3..3....3..2....3..0....3..3....1..3....0..0 CROSSREFS Sequence in context: A237158 A237151 A237574 * A237544 A206752 A237539 Adjacent sequences:  A237566 A237567 A237568 * A237570 A237571 A237572 KEYWORD nonn AUTHOR R. H. Hardin, Feb 09 2014 STATUS approved

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Last modified November 26 10:15 EST 2022. Contains 358356 sequences. (Running on oeis4.)