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A236803 Number of (n+1)X(2+1) 0..2 arrays with the maximum plus the lower median minus the upper median minus the minimum of every 2X2 subblock equal 1
277, 1435, 8825, 60187, 410305, 2926867, 20377961, 147734251, 1039350577, 7613312515, 53944065785, 398046992347, 2834584305025, 21024264295027, 150246189753161, 1118382878221771, 8011732148951377, 59783309384192995 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 2 of A236809

LINKS

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

FORMULA

Empirical: a(n) = 12*a(n-1) +15*a(n-2) -672*a(n-3) +2434*a(n-4) +864*a(n-5) -17988*a(n-6) +24192*a(n-7) +14472*a(n-8) -46656*a(n-9) +23328*a(n-10)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A142831 A105977 A297891 * A048525 A189609 A264371

Adjacent sequences:  A236800 A236801 A236802 * A236804 A236805 A236806

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 31 2014

STATUS

approved

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Last modified May 19 05:04 EDT 2022. Contains 353826 sequences. (Running on oeis4.)