A247740 Total number of T shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.
0, 0, 0, 6, 66, 772, 6760, 60122, 552930, 4887052, 42365416, 361418592, 3063883318, 25819450218, 215875963118, 1793852851690, 14833014554258, 122147248758898, 1002084660185318, 8192705916505028, 66777880125812344, 542833111487459532, 4401913323626254612, 35616479684643020150
Offset: 0
Keywords
Links
- Alois P. Heinz, Table of n, a(n) for n = 0..500
- Wikipedia, Pentomino
Formula
a(n) = Sum_{k>0} k * A247707(n,k).