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 A212933 Number of 4Xn 0..n-1 arrays with no column j greater than column j-1 in all rows 1
 1, 255, 518320, 4041974015, 85800824609376, 4051316109991426752, 372271852759802667094256, 60525940157456181486116315391, 16213293097463939456656505907266320 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,2 COMMENTS Row 4 of A212930 LINKS R. H. Hardin, Table of n, a(n) for n = 1..16 EXAMPLE Some solutions for n=3 ..2..0..1....2..1..0....0..0..2....0..0..0....2..2..2....2..2..1....2..2..0 ..0..0..2....2..1..2....0..0..2....2..0..2....1..2..1....2..0..0....0..0..2 ..1..1..2....2..1..1....0..0..0....2..0..1....0..2..2....2..0..0....2..0..0 ..0..0..0....0..1..1....1..2..0....0..0..0....0..0..2....2..2..2....1..0..1 CROSSREFS Sequence in context: A069409 A069435 A221214 * A270876 A263166 A139305 Adjacent sequences:  A212930 A212931 A212932 * A212934 A212935 A212936 KEYWORD nonn AUTHOR R. H. Hardin May 31 2012 STATUS approved

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Last modified March 20 07:42 EDT 2019. Contains 321345 sequences. (Running on oeis4.)