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A186902 T(n,k)=Number of (n+1)X(k+1) binary arrays with every 2X2 subblock determinant equal to exactly one or two horizontal and vertical neighbor 2X2 subblock determinants 9
0, 30, 30, 76, 148, 76, 234, 140, 140, 234, 632, 406, 444, 406, 632, 1832, 1246, 1692, 1692, 1246, 1832, 5182, 3106, 3948, 5401, 3948, 3106, 5182, 14860, 7240, 13894, 14437, 14437, 13894, 7240, 14860, 42346, 19040, 35270, 49303, 39372, 49303, 35270 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Table starts
......0.....30......76.....234......632......1832.......5182.......14860
.....30....148.....140.....406.....1246......3106.......7240.......19040
.....76....140.....444....1692.....3948.....13894......35270......122820
....234....406....1692....5401....14437.....49303.....171877......608194
....632...1246....3948...14437....39372....158437.....554824.....2203303
...1832...3106...13894...49303...158437....703983....2920816....12599670
...5182...7240...35270..171877...554824...2920816...14050512....85310077
..14860..19040..122820..608194..2203303..12599670...85310077...523902288
..42346..49004..328174.1974583..7843906..53255787..380380974..2795274149
.121016.124974.1091770.6828851.30466049.237167117.2084921316.16608468926
LINKS
EXAMPLE
Some solutions for 4X3
..0..1..1....1..1..0....0..1..1....1..1..0....0..0..0....0..0..1....0..1..0
..1..1..0....0..1..1....1..1..0....0..1..1....0..1..1....1..1..1....1..1..1
..0..0..0....0..0..0....1..1..0....0..0..1....1..1..0....1..1..0....1..0..1
..1..0..0....0..1..1....0..1..1....1..0..1....0..1..1....0..1..1....1..0..1
CROSSREFS
Column 1 is A185479
Sequence in context: A220440 A040871 A022364 * A185487 A051723 A247517
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Feb 28 2011
STATUS
approved

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Last modified April 20 03:03 EDT 2024. Contains 371798 sequences. (Running on oeis4.)