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A237093 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median minus the upper median of every 2X2 subblock equal 1
303, 1735, 10466, 66831, 428497, 2832722, 18682733, 125843583, 844258374, 5747581507, 38959859799, 266780373966, 1819543862147, 12497585083387, 85550631105026, 588510997758869, 4037376346765561, 27793795792256912 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A237099

LINKS

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

FORMULA

Empirical: a(n) = 17*a(n-1) -33*a(n-2) -942*a(n-3) +5519*a(n-4) +9822*a(n-5) -147568*a(n-6) +170826*a(n-7) +1482255*a(n-8) -3807734*a(n-9) -6026381*a(n-10) +27536576*a(n-11) +4621373*a(n-12) -101103639*a(n-13) +39805818*a(n-14) +215531556*a(n-15) -144788130*a(n-16) -282774890*a(n-17) +228947844*a(n-18) +232233520*a(n-19) -197348088*a(n-20) -116570680*a(n-21) +94032480*a(n-22) +32544624*a(n-23) -22765248*a(n-24) -3769056*a(n-25) +2180160*a(n-26)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A252605 A252598 A252597 * A236813 A332130 A291132

Adjacent sequences:  A237090 A237091 A237092 * A237094 A237095 A237096

KEYWORD

nonn

AUTHOR

R. H. Hardin, Feb 03 2014

STATUS

approved

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Last modified June 21 06:55 EDT 2021. Contains 345358 sequences. (Running on oeis4.)