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 A219574 Number of n X 4 arrays of the minimum value of corresponding elements and their horizontal or vertical neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..3 n X 4 array. 1
 20, 132, 1866, 18564, 154271, 1230906, 9838834, 77121132, 574114068, 4011221077, 26423019415, 165621299493, 995370542165, 5764471362464, 32276996597715, 175191988301623, 923800070721626, 4741175946914574, 23718827918983202, 115807012054133424, 552411871489072567 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..131 EXAMPLE Some solutions for n=3: ..2..0..0..0....1..1..0..0....1..0..0..0....1..0..0..0....1..1..0..0 ..1..1..0..0....2..1..1..0....2..1..0..0....1..1..0..0....3..1..1..0 ..1..1..1..3....3..1..1..1....2..2..3..2....3..1..2..1....3..2..0..0 CROSSREFS Column 4 of A219578. Sequence in context: A006417 A156392 A374709 * A356272 A188145 A168178 Adjacent sequences: A219571 A219572 A219573 * A219575 A219576 A219577 KEYWORD nonn AUTHOR R. H. Hardin, Nov 23 2012 STATUS approved

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Last modified August 10 04:12 EDT 2024. Contains 375044 sequences. (Running on oeis4.)