Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape Z; triangle T(n,k), n>=0, read by rows.
A247713
Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape Z; triangle T(n,k), n>=0, read by rows.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =52a(4) =4a(5) =451a(6) =48a(7) =2a(8) =3498a(9) =484a(10) =24a(11) =23502a(12) =4136a(13) =300a(14) =12a(15) =173611a(16) =37674a(17) =3262a(18) =142a(19) =1323447a(20) =335388a(21) =35938a(22) =1964a(23) =44a(24) =9920654a(25) =2892492a(26) =365458a(27) =25752a(28) =986a(29) =12
External references
- oeis: A247713