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A237161 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the minimum minus the upper median minus the lower median of every 2X2 subblock equal 1
245, 997, 4365, 20669, 102265, 525809, 2783881, 15103101, 83563325, 469820341, 2675878281, 15400507993, 89380166905, 522231871717, 3067722645325, 18097999626893, 107134656058457, 635936347749441, 3783041628703785 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237167

LINKS

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

FORMULA

Empirical: a(n) = 15*a(n-1) -49*a(n-2) -250*a(n-3) +1567*a(n-4) +391*a(n-5) -13821*a(n-6) +7384*a(n-7) +58596*a(n-8) -39520*a(n-9) -137336*a(n-10) +78264*a(n-11) +179256*a(n-12) -67104*a(n-13) -119232*a(n-14) +20736*a(n-15) +31104*a(n-16)

EXAMPLE

Some solutions for n=5

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

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

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

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

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

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

CROSSREFS

Sequence in context: A188239 A132830 A236887 * A056264 A154080 A259511

Adjacent sequences:  A237158 A237159 A237160 * A237162 A237163 A237164

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 04 2014

STATUS

approved

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Last modified September 29 10:06 EDT 2020. Contains 337428 sequences. (Running on oeis4.)