Triangle read by rows: T(n,k) is the number of k-cell columns in all directed column-convex polyominoes of area n (1<=k<=n).
A121468
Triangle read by rows: T(n,k) is the number of k-cell columns in all directed column-convex polyominoes of area n (1<=k<=n).
Terms
- a(0) =1a(1) =2a(2) =1a(3) =6a(4) =3a(5) =1a(6) =18a(7) =9a(8) =4a(9) =1a(10) =53a(11) =28a(12) =12a(13) =5a(14) =1a(15) =154a(16) =85a(17) =38a(18) =15a(19) =6a(20) =1a(21) =443a(22) =253a(23) =117a(24) =48a(25) =18a(26) =7a(27) =1a(28) =1264a(29) =742
External references
- oeis: A121468