T(n,k)=Number of nXk 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by both a 1 and a 0.

A203371

T(n,k)=Number of nXk 0..2 arrays with every 1 immediately preceded by 0 to the left or above, and every 2 immediately preceded by both a 1 and a 0.

Terms

    a(0) =1a(1) =2a(2) =2a(3) =3a(4) =9a(5) =3a(6) =5a(7) =30a(8) =30a(9) =5a(10) =8a(11) =110a(12) =206a(13) =110a(14) =8a(15) =13a(16) =390a(17) =1570a(18) =1570a(19) =390a(20) =13a(21) =21a(22) =1399a(23) =11541a(24) =25087a(25) =11541a(26) =1399a(27) =21a(28) =34a(29) =4998

External references