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A180998 Number of (n+1)xn binary matrices with rows and columns each in strictly increasing order as binary numbers and no 1 neighboring another 1 2
1, 1, 2, 5, 21, 124, 1145, 15521, 320688, 9876633, 459462273, 32032593512, 3362495995045, 529976350066025, 125628977242518536, 44744362871512206777, 23958150449772962130381, 19279048205688770346279728 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Subdiagonal 1 of A180997
LINKS
EXAMPLE
All solutions for 5X4
..0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0....0..0..0..0
..0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1....0..0..0..1
..0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0....0..0..1..0
..0..1..0..0....0..1..0..0....0..1..0..0....0..1..0..1....0..1..0..1
..1..0..0..0....1..0..1..0....1..0..0..1....1..0..0..0....1..0..1..0
CROSSREFS
Sequence in context: A212922 A243272 A139153 * A144271 A193189 A358316
KEYWORD
nonn
AUTHOR
R. H. Hardin Sep 30 2010
STATUS
approved

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)