Number of unitary polyominoes without holes with n cells. A unitary polyomino is a polyomino whose edges all have length 1.
A245660
Number of unitary polyominoes without holes with n cells. A unitary polyomino is a polyomino whose edges all have length 1.
Terms
- a(0) =1a(1) =0a(2) =0a(3) =0a(4) =1a(5) =0a(6) =0a(7) =1a(8) =1a(9) =0a(10) =2a(11) =1a(12) =2a(13) =4a(14) =5a(15) =4a(16) =12a(17) =13a(18) =20a(19) =29a(20) =52a(21) =67a(22) =106a(23) =173a(24) =269a(25) =375a(26) =658a(27) =991a(28) =1512a(29) =2425
External references
- oeis: A245660