Number of tilings of a 5 X n rectangle using n pentominoes of any but the T shape.
A247771
Number of tilings of a 5 X n rectangle using n pentominoes of any but the T shape.
Terms
- a(0) =1a(1) =1a(2) =5a(3) =50a(4) =437a(5) =3270a(6) =21720a(7) =160593a(8) =1209537a(9) =8999307a(10) =66054288a(11) =485082083a(12) =3583263174a(13) =26469863097a(14) =195317239597
External references
- oeis: A247771