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A203102 Number of n X n binary arrays with every 1 immediately preceded by 0 0 to the left or above 0
1, 1, 23, 592, 27930, 4984843, 2482513429, 3024912314764, 10252037660298200, 96894129507021776898, 2459526431235740649572096, 169397666939694686725348936336, 31898632588336093438359543528177154 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,3
COMMENTS
Diagonal of A203108
LINKS
EXAMPLE
Some solutions for n=5
..0..0..0..0..0....0..0..0..0..1....0..0..0..0..0....0..0..1..0..0
..0..0..0..0..0....0..0..0..0..1....0..0..0..1..0....0..0..0..0..0
..0..0..0..0..0....0..0..0..0..0....1..0..1..0..0....0..1..0..0..0
..0..1..1..1..0....1..0..1..1..0....0..0..1..0..0....0..0..1..0..1
..0..0..1..0..1....0..0..0..1..1....0..0..0..1..1....0..0..0..0..1
CROSSREFS
Sequence in context: A043347 A015696 A106538 * A362482 A294995 A142750
KEYWORD
nonn
AUTHOR
R. H. Hardin Dec 29 2011
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)