Number of 4 X n binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

A266471

Number of 4 X n binary arrays with rows and columns lexicographically nondecreasing and column sums nonincreasing.

Terms

    a(0) =5a(1) =12a(2) =29a(3) =66a(4) =137a(5) =261a(6) =463a(7) =775a(8) =1237a(9) =1898a(10) =2817a(11) =4064a(12) =5721a(13) =7883a(14) =10659a(15) =14173a(16) =18565a(17) =23992a(18) =30629a(19) =38670a(20) =48329a(21) =59841a(22) =73463a(23) =89475a(24) =108181a(25) =129910a(26) =155017a(27) =183884a(28) =216921a(29) =254567

External references