Number of (n+1)X(2+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.

A235759

Number of (n+1)X(2+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise.

Terms

    a(0) =48a(1) =216a(2) =977a(3) =3900a(4) =15197a(5) =55816a(6) =199720a(7) =691634a(8) =2344746a(9) =7785110a(10) =25435107a(11) =81902482a(12) =260560751a(13) =820159066a(14) =2558049098a(15) =7914489044a(16) =24315115380a(17) =74237856204a(18) =225414249637a(19) =681094975856

External references