Irregular triangle read by rows: T(n,k) is the number of free polyominoes with n cells having k regions between the polyominoes and their bounding boxes, n >= 1, k >= 0.
A380282
Irregular triangle read by rows: T(n,k) is the number of free polyominoes with n cells having k regions between the polyominoes and their bounding boxes, n >= 1, k >= 0.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =1a(4) =2a(5) =1a(6) =2a(7) =1a(8) =4a(9) =5a(10) =1a(11) =1a(12) =2a(13) =6a(14) =18a(15) =7a(16) =2a(17) =1a(18) =13a(19) =50a(20) =34a(21) =10a(22) =2a(23) =25a(24) =144a(25) =146a(26) =50a(27) =2a(28) =2a(29) =48
External references
- oeis: A380282