Triangle T(n,k) read by rows giving number of fixed 4 X k polyominoes with n cells (n >= 4, 1<=k<=n-3).
A059680
Triangle T(n,k) read by rows giving number of fixed 4 X k polyominoes with n cells (n >= 4, 1<=k<=n-3).
Terms
- a(0) =1a(1) =0a(2) =12a(3) =0a(4) =18a(5) =50a(6) =0a(7) =8a(8) =154a(9) =120a(10) =0a(11) =1a(12) =212a(13) =584a(14) =230a(15) =0a(16) =0a(17) =158a(18) =1396a(19) =1526a(20) =388a(21) =0a(22) =0a(23) =62a(24) =2038a(25) =5154a(26) =3276a(27) =602a(28) =0a(29) =0
External references
- oeis: A059680