Irregular triangle read by rows: T(n,k) is the sum of the widths of the free polyominoes with n cells and width k, n >= 1, 1 <= k <= ceiling(n/2).
A379637
Irregular triangle read by rows: T(n,k) is the sum of the widths of the free polyominoes with n cells and width k, n >= 1, 1 <= k <= ceiling(n/2).
Terms
- a(0) =1a(1) =1a(2) =1a(3) =2a(4) =1a(5) =8a(6) =1a(7) =10a(8) =18a(9) =1a(10) =24a(11) =66a(12) =1a(13) =36a(14) =213a(15) =72a(16) =1a(17) =74a(18) =579a(19) =552a(20) =1a(21) =120a(22) =1470a(23) =2644a(24) =365a(25) =1a(26) =234a(27) =3663a(28) =10188a(29) =3845
External references
- oeis: A379637