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A238174 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the minimum of every 2X2 subblock equal 1
423, 5321, 69023, 938601, 12951743, 180345769, 2520461647, 35289713177, 494500172559, 6931846504281, 97186455651295, 1362689160952841, 19107483153243615, 267927527528514313, 3756941779561193327 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A238180

LINKS

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

FORMULA

Empirical: a(n) = 22*a(n-1) -111*a(n-2) -106*a(n-3) +1473*a(n-4) -2198*a(n-5) -121*a(n-6) +1514*a(n-7) -472*a(n-8)

EXAMPLE

Some solutions for n=3

..1..0..0....0..2..0....1..1..0....1..0..0....0..2..2....0..2..1....0..0..0

..2..1..2....2..0..1....0..2..2....0..2..2....0..0..2....0..0..2....1..2..2

..1..0..2....2..2..0....1..1..0....0..0..2....1..2..0....2..2..1....2..0..2

..2..2..2....0..1..0....2..0..2....0..2..1....2..0..0....0..0..2....0..0..1

CROSSREFS

Sequence in context: A206662 A205831 A206408 * A251013 A230678 A091293

Adjacent sequences:  A238171 A238172 A238173 * A238175 A238176 A238177

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 19 2014

STATUS

approved

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Last modified January 18 00:40 EST 2022. Contains 350410 sequences. (Running on oeis4.)