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A186840 T(n,k)=Number of (n+2)X(k+2) binary arrays with 3X3 subblock sums nondecreasing rightwards and downwards. 10
512, 2688, 2688, 14112, 19904, 14112, 74088, 147428, 147428, 74088, 324576, 1075071, 1537476, 1075071, 324576, 1421952, 6019798, 15478835, 15478835, 6019798, 1421952, 6229504, 33731024, 111211414, 209888936, 111211414, 33731024 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Table starts
.......512........2688........14112.........74088........324576.......1421952
......2688.......19904.......147428.......1075071.......6019798......33731024
.....14112......147428......1537476......15478835.....111211414.....798816802
.....74088.....1075071.....15478835.....209888936....1919555447...17494747887
....324576.....6019798....111211414....1919555447...21242244160..235234097572
...1421952....33731024....798816802...17494747887..235234097572.3176962520030
...6229504...188814612...5699887192..156721188699.2571152951156
..24748736...897952936..32614678623.1078797163411
..98322424..4272342678.186554693948
.390617891.20338694068
LINKS
EXAMPLE
Some solutions for 5X4
..0..1..0..1....0..0..1..1....0..1..1..0....0..0..0..0....0..0..0..0
..1..1..0..1....0..1..0..1....0..1..0..0....0..1..1..0....0..0..0..1
..0..1..0..0....0..1..1..0....0..0..0..1....1..0..1..1....0..1..0..1
..0..1..1..0....1..1..1..1....1..1..1..1....0..0..1..1....1..0..1..1
..1..1..0..1....1..1..0..1....1..0..1..1....1..0..1..1....0..0..0..1
CROSSREFS
Sequence in context: A258511 A254998 A254991 * A224643 A186832 A254553
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin, Feb 27 2011
STATUS
approved

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Last modified July 22 00:08 EDT 2024. Contains 374478 sequences. (Running on oeis4.)