Number of (n+1) X (2+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

A250577

Number of (n+1) X (2+1) 0..1 arrays with nondecreasing max(x(i,j),x(i,j-1)) in the i direction and nondecreasing min(x(i,j),x(i-1,j)) in the j direction.

Terms

    a(0) =24a(1) =60a(2) =142a(3) =329a(4) =758a(5) =1743a(6) =4009a(7) =9223a(8) =21227a(9) =48864a(10) =112503a(11) =259042a(12) =596486a(13) =1373534a(14) =3162900a(15) =7283395a(16) =16771972a(17) =38622017a(18) =88937775a(19) =204803649a(20) =471616777a(21) =1086027506a(22) =2500877597a(23) =5758959852a(24) =13261592356a(25) =30538471600a(26) =70323248330

External references