

A237772


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


1



81, 300, 1176, 4480, 17768, 67152, 263504, 1002432, 3967808, 15017792, 59024064, 224325120, 886756160, 3358866432, 13215441920, 50194751488, 198246798080, 751303173120, 2958100380672, 11230764994560, 44330876831744
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OFFSET

1,1


COMMENTS

Column 1 of A237779


LINKS

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


FORMULA

Empirical: a(n) = 188*a(n4) +512*a(n6) +336*a(n8) 64*a(n10) for n>13


EXAMPLE

Some solutions for n=5
..1..1....0..2....0..2....0..0....2..0....1..0....2..2....1..2....2..1....0..0
..1..0....0..1....1..2....0..2....0..2....1..0....0..2....1..0....2..1....2..0
..0..2....1..0....0..1....1..0....1..1....0..2....0..1....1..1....0..1....1..0
..1..2....0..0....0..1....1..1....0..1....0..2....0..1....0..2....0..1....1..1
..0..1....1..1....1..2....2..1....2..0....1..1....2..0....2..1....1..2....2..0
..2..2....0..2....2..1....2..2....2..0....0..1....2..1....0..0....2..1....0..2


CROSSREFS

Sequence in context: A237809 A237802 A237779 * A236819 A237099 A236812
Adjacent sequences: A237769 A237770 A237771 * A237773 A237774 A237775


KEYWORD

nonn


AUTHOR

R. H. Hardin, Feb 13 2014


STATUS

approved



