Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape Y; triangle T(n,k), n>=0, read by rows.
A247712
Number T(n,k) of tilings of a 5 X n rectangle with pentominoes of any shape and exactly k pentominoes of shape Y; triangle T(n,k), n>=0, read by rows.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =44a(4) =12a(5) =321a(6) =136a(7) =44a(8) =2404a(9) =1160a(10) =404a(11) =24a(12) =14a(13) =14692a(14) =9380a(15) =3388a(16) =392a(17) =90a(18) =8a(19) =98831a(20) =78492a(21) =30834a(22) =5724a(23) =748a(24) =60a(25) =684729a(26) =631020a(27) =292250a(28) =74016a(29) =13280
External references
- oeis: A247712