Total number of Y shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.
A247745
Total number of Y shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.
Terms
- a(0) =0a(1) =0a(2) =0a(3) =12a(4) =224a(5) =2096a(6) =17732a(7) =160624a(8) =1498176a(9) =13404068a(10) =115123856a(11) =980282312a(12) =8327179132a(13) =70264899456a(14) =587727020332
External references
- oeis: A247745