Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape X; triangle T(n,k), n>=0, read by rows.
A247711
Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape X; triangle T(n,k), n>=0, read by rows.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =55a(4) =1a(5) =493a(6) =8a(7) =3930a(8) =76a(9) =27207a(10) =734a(11) =9a(12) =207118a(13) =7414a(14) =157a(15) =1622723a(16) =71986a(17) =2064a(18) =8a(19) =12544364a(20) =638499a(21) =22232a(22) =259a(23) =95912510a(24) =5558790a(25) =222964a(26) =3898a(27) =50a(28) =732066083a(29) =47971603
External references
- oeis: A247711