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A213957 Number of n X n 0..3 matrices with row and column i=1..n having sum <= i*3 0
4, 120, 32060, 74323976, 1494988224948, 261421322089741976, 398278555474658144086480, 5298226825488439815883527067288 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A213962
LINKS
EXAMPLE
Some solutions for n=4
..0..0..1..2....1..0..0..0....3..0..0..0....3..0..0..0....3..0..0..0
..0..3..3..0....0..3..1..2....0..1..1..1....0..3..3..0....0..2..2..0
..1..0..1..2....1..0..1..3....0..1..2..3....0..1..3..3....0..3..1..3
..1..1..0..0....1..3..3..1....0..1..2..0....0..1..1..1....0..0..3..3
CROSSREFS
Sequence in context: A307935 A001332 A071304 * A006607 A286757 A239187
KEYWORD
nonn
AUTHOR
R. H. Hardin Jun 28 2012
STATUS
approved

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Last modified April 21 22:59 EDT 2024. Contains 371886 sequences. (Running on oeis4.)