Number of nX6 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nonincreasing.

A266545

Number of nX6 binary arrays with rows and columns lexicographically nondecreasing and row and column sums nonincreasing.

Terms

    a(0) =2a(1) =5a(2) =11a(3) =27a(4) =58a(5) =176a(6) =366a(7) =1062a(8) =2571a(9) =7345a(10) =17540a(11) =47970a(12) =109375a(13) =272134a(14) =595031a(15) =1359839a(16) =2827311a(17) =6072251a(18) =12027150a(19) =24388681a(20) =46416427a(21) =89575530a(22) =164016985a(23) =303788687a(24) =537614351a(25) =959313275a(26) =1647205384

External references