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A236868
Number of (n+1)X(1+1) 0..2 arrays with the maximum plus the upper median minus the lower median of every 2X2 subblock equal.
1
81, 287, 1069, 4131, 16153, 63867, 253269, 1008347, 4017129, 16029051, 63964053, 255428971, 1020001673, 4074620555, 16277074485, 65036521755, 259868094441, 1038512291675, 4150437015637, 16589196684619, 66311024500553
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OFFSET
1,1
COMMENTS
Column 1 of
A236875
LINKS
R. H. Hardin,
Table of n, a(n) for n = 1..210
FORMULA
Empirical: a(n) = 7*a(n-1) +13*a(n-2) -169*a(n-3) +51*a(n-4) +1481*a(n-5) -1425*a(n-6) -5803*a(n-7) +7222*a(n-8) +10368*a(n-9) -14764*a(n-10) -7052*a(n-11) +12456*a(n-12) +464*a(n-13) -3232*a(n-14) +128*a(n-15) +256*a(n-16)
EXAMPLE
Some solutions for n=5
..1..0....2..1....1..1....0..2....2..0....1..2....0..0....0..0....1..2....2..0
..2..1....0..0....1..2....1..2....1..1....2..2....1..2....1..2....0..2....1..1
..1..1....1..2....1..0....0..2....1..2....2..2....0..2....1..2....0..1....1..2
..2..1....2..0....1..2....1..0....1..1....1..2....2..1....2..1....2..2....0..1
..1..1....2..1....1..0....0..2....1..2....0..1....0..2....0..2....0..1....0..1
..2..1....0..0....0..1....1..0....1..1....1..0....0..1....2..1....0..2....1..0
CROSSREFS
Sequence in context:
A236809
A236802
A236875
*
A237375
A237368
A017078
Adjacent sequences:
A236865
A236866
A236867
*
A236869
A236870
A236871
KEYWORD
nonn
AUTHOR
R. H. Hardin
, Feb 01 2014
STATUS
approved
