Triangle read by rows: T(n,k) is the number of directed column-convex polyominoes of area n and having k cells in the longest column (1<=k<=n).

A121300

Triangle read by rows: T(n,k) is the number of directed column-convex polyominoes of area n and having k cells in the longest column (1<=k<=n).

Terms

    a(0) =1a(1) =1a(2) =1a(3) =1a(4) =3a(5) =1a(6) =1a(7) =7a(8) =4a(9) =1a(10) =1a(11) =15a(12) =12a(13) =5a(14) =1a(15) =1a(16) =31a(17) =35a(18) =15a(19) =6a(20) =1a(21) =1a(22) =63a(23) =95a(24) =48a(25) =18a(26) =7a(27) =1a(28) =1a(29) =127

External references