Number of tilings of a 5 X n rectangle using n pentominoes of any shape including exactly one X shape.
A247828
Number of tilings of a 5 X n rectangle using n pentominoes of any shape including exactly one X shape.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =8a(5) =76a(6) =734a(7) =7414a(8) =71986a(9) =638499a(10) =5558790a(11) =47971603a(12) =410502410a(13) =3473846885a(14) =29078659564a(15) =241699322196
External references
- oeis: A247828