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A235759
Number of (n+1)X(2+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise
1
48, 216, 977, 3900, 15197, 55816, 199720, 691634, 2344746, 7785110, 25435107, 81902482, 260560751, 820159066, 2558049098, 7914489044, 24315115380, 74237856204, 225414249637, 681094975856, 2048957867649, 6139801922404
OFFSET
1,1
COMMENTS
Column 2 of A235765
LINKS
FORMULA
Empirical: a(n) = 10*a(n-1) -29*a(n-2) -20*a(n-3) +230*a(n-4) -196*a(n-5) -646*a(n-6) +984*a(n-7) +839*a(n-8) -1926*a(n-9) -429*a(n-10) +1916*a(n-11) -108*a(n-12) -960*a(n-13) +208*a(n-14) +192*a(n-15) -64*a(n-16)
EXAMPLE
Some solutions for n=4
..1..0..1....1..0..1....1..0..1....1..1..1....0..1..1....1..0..1....1..1..1
..1..0..1....0..0..0....0..1..1....1..1..1....1..0..1....1..0..1....0..1..0
..0..0..0....0..0..0....0..1..0....1..0..1....0..1..1....1..0..1....0..1..0
..0..0..1....0..0..0....0..0..1....0..1..0....1..0..1....0..0..0....0..1..0
..0..0..0....0..0..1....0..0..0....0..0..1....1..0..0....0..0..0....1..0..1
CROSSREFS
Sequence in context: A260240 A260062 A364922 * A062248 A100146 A235542
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 15 2014
STATUS
approved