Triangle read by rows: T(n,k) = number of free hexagonal polyominoes with n cells, where the maximum number of collinear cell centers on any line in the plane is k.

A378015

Triangle read by rows: T(n,k) = number of free hexagonal polyominoes with n cells, where the maximum number of collinear cell centers on any line in the plane is k.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =2a(5) =1a(6) =0a(7) =4a(8) =2a(9) =1a(10) =0a(11) =2a(12) =16a(13) =3a(14) =1a(15) =0a(16) =3a(17) =52a(18) =23a(19) =3a(20) =1a(21) =0a(22) =0a(23) =169a(24) =129a(25) =30a(26) =4a(27) =1a(28) =0a(29) =0

External references