Number of tilings of a 5 X n rectangle using n pentominoes of any but the I shape.
A247767
Number of tilings of a 5 X n rectangle using n pentominoes of any but the I shape.
Terms
- a(0) =1a(1) =0a(2) =4a(3) =47a(4) =394a(5) =2082a(6) =15113a(7) =111664a(8) =789930a(9) =5388729a(10) =37962036a(11) =267900038a(12) =1877701685a(13) =13141471298a(14) =92221485370a(15) =647245199343
External references
- oeis: A247767