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A201378 Number of n X n 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other 0

%I

%S 2,3,19,121,7148,326650,175765510,74872992399,400292326222730,

%T 1748923742658486631

%N Number of n X n 0..1 arrays with rows and columns lexicographically nondecreasing and the instance counts of every value within one of each other

%C Diagonal of A201384

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Nov 30 2011

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Last modified January 23 03:15 EST 2022. Contains 350504 sequences. (Running on oeis4.)