Number of nX6 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.
A266933
Number of nX6 binary arrays with rows lexicographically nondecreasing and columns lexicographically nondecreasing and row sums nondecreasing and column sums nonincreasing.
Terms
- a(0) =2a(1) =6a(2) =19a(3) =82a(4) =429a(5) =2577a(6) =15850a(7) =96503a(8) =555060a(9) =2977370a(10) =14782970a(11) =68041108a(12) =291292442a(13) =1165800099a(14) =4383605127a(15) =15564591521a(16) =52423001756a(17) =168200350788a(18) =516045791503
External references
- oeis: A266933