Number of n X 2 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

A266464

Number of n X 2 binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =7a(4) =12a(5) =19a(6) =29a(7) =42a(8) =59a(9) =80a(10) =106a(11) =137a(12) =174a(13) =217a(14) =267a(15) =324a(16) =389a(17) =462a(18) =544a(19) =635a(20) =736a(21) =847a(22) =969a(23) =1102a(24) =1247a(25) =1404a(26) =1574a(27) =1757a(28) =1954a(29) =2165

External references