

A237539


Number of (n+1)X(1+1) 0..3 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one


1



256, 1888, 14208, 106496, 798208, 5985280, 44879872, 336408576, 2521595904, 18907365376, 141774028800, 1062710738944, 7965687414784, 59728115007488, 447862357884928, 3357089663549440, 25163504533110784, 188680351567052800
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OFFSET

1,1


COMMENTS

Column 1 of A237544


LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210


FORMULA

Empirical: a(n) = 3120*a(n4) +121600*a(n8) +4931584*a(n12) 10485760*a(n16) for n>17


EXAMPLE

Some solutions for n=4
..3..2....1..1....3..3....0..0....3..0....2..2....2..0....0..0....2..2....0..3
..3..2....1..2....0..0....3..3....1..3....1..3....2..3....1..2....2..2....2..1
..3..3....0..3....2..1....2..3....2..2....1..0....0..3....2..1....0..1....0..2
..0..0....0..2....3..2....2..3....3..0....3..0....2..0....3..1....3..2....2..2
..1..2....3..3....1..3....1..3....2..3....3..3....1..1....3..1....0..0....1..0


CROSSREFS

Sequence in context: A237569 A237544 A206752 * A206745 A237791 A237786
Adjacent sequences: A237536 A237537 A237538 * A237540 A237541 A237542


KEYWORD

nonn


AUTHOR

R. H. Hardin, Feb 09 2014


STATUS

approved



