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A188419 Number of (4*n) X n binary arrays with rows in nonincreasing order, four 1's in every column and no more than three 1's in any row. 0

%I

%S 1,5,81,3217,252493,33313408,6720357785,1943505834628,768799728447441

%N Number of (4*n) X n binary arrays with rows in nonincreasing order, four 1's in every column and no more than three 1's in any row.

%C Row 4 of A188416.

%e All solutions for 8 X 2

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

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

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

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

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

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

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

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

%Y Cf. A188416.

%K nonn

%O 1,2

%A _R. H. Hardin_, Mar 30 2011

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Last modified February 3 04:55 EST 2023. Contains 360024 sequences. (Running on oeis4.)