Number of (n+1) X (1+1) 0..1 arrays with the sum of each 2 X 2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.

A235510

Number of (n+1) X (1+1) 0..1 arrays with the sum of each 2 X 2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise.

Terms

    a(0) =16a(1) =58a(2) =209a(3) =746a(4) =2660a(5) =9476a(6) =33753a(7) =120216a(8) =428160a(9) =1524918a(10) =5431081a(11) =19343086a(12) =68891428a(13) =245360464a(14) =873864257a(15) =3112313708a(16) =11084669648a(17) =39478636370a(18) =140605248417a(19) =500773018002

External references