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A235785 Number of (2+1)X(n+1) 0..2 arrays with the difference of the upper and lower median value of each 2X2 subblock in lexicographically nondecreasing order columnwise and nonincreasing rowwise 1
537, 7331, 86691, 922543, 9242949, 88065309, 811287445, 7265948995, 63735420061, 549443735855, 4672613503973, 39287253800941, 327286638371893, 2705376681897273, 22218958397202703, 181488778142157095 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Row 2 of A235784
LINKS
FORMULA
Empirical recurrence of order 49 (see link above)
EXAMPLE
Some solutions for n=3
..0..2..2..1....2..1..0..2....1..1..1..0....0..1..1..2....2..1..2..0
..1..1..0..0....1..1..0..1....1..2..2..2....0..0..2..0....1..0..0..1
..1..1..1..2....1..2..0..1....2..2..1..2....0..1..1..2....2..1..1..0
CROSSREFS
Sequence in context: A206067 A183725 A235780 * A235561 A252339 A224742
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2014
STATUS
approved

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Last modified February 26 17:19 EST 2024. Contains 370352 sequences. (Running on oeis4.)