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A235977
Number of (n+1)X(4+1) 0..2 arrays with the upper median equal to the lower median in every 2X2 subblock
1
3741, 89555, 1947197, 46727365, 1101519021, 26513929449, 636000634655, 15322368309233, 368889441554023, 8889119296332995, 214171250506380939, 5161137430892686227, 124370527249999193137, 2997137255815847180323
OFFSET
1,1
COMMENTS
Column 4 of A235981
FORMULA
Empirical recurrence of order 61 (see link above)
EXAMPLE
Some solutions for n=2
..2..2..1..0..2....1..1..2..2..2....0..2..2..2..0....1..2..0..1..0
..1..2..2..1..1....1..2..2..2..0....1..1..2..2..2....1..1..1..2..1
..2..2..1..0..1....1..0..2..1..1....2..1..0..2..2....0..2..1..1..0
CROSSREFS
Sequence in context: A020410 A166262 A340403 * A235243 A368589 A180974
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 17 2014
STATUS
approved