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 A220028 Number of n X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..1 n X n array 0

%I #5 Dec 18 2015 18:18:23

%S 2,4,10,34,111,358,1165,3789,12375,40583,133632,441773

%N Number of n X n arrays of the minimum value of corresponding elements and their horizontal or diagonal neighbors in a random, but sorted with lexicographically nondecreasing rows and nonincreasing columns, 0..1 n X n array

%C Diagonal of A220032

%e Some solutions for n=3

%e ..0..0..0....1..0..0....0..0..0....0..0..0....0..0..0....0..0..0....1..0..0

%e ..0..0..0....1..0..0....0..0..0....1..0..0....0..0..0....1..0..0....1..1..1

%e ..1..0..0....1..1..1....0..0..0....1..1..1....1..1..0....1..0..0....1..1..1

%K nonn

%O 1,1

%A _R. H. Hardin_ Dec 03 2012

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Last modified September 11 23:47 EDT 2024. Contains 375842 sequences. (Running on oeis4.)