A247739 Total number of P shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.
0, 0, 4, 60, 556, 5328, 45316, 405636, 3583136, 30801264, 261702184, 2204389124, 18485952896, 154072120428, 1276431617512, 10525735832272, 86463238965520, 707822586795020, 5776135319900600, 47001025464956044, 381480686633266156, 3089168335328298424, 24963223479997963992
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 * A247706(n,k).