A247736 Total number of I shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.
0, 1, 2, 11, 122, 2278, 17502, 140037, 1250890, 11184764, 96901618, 810143038, 6787465080, 56871594099, 473417649550, 3913478050583, 32192184170708, 264014564271675, 2158561440821352, 17592866753339355, 142983916007396542, 1159269824603687631, 9378694043134778568
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 * A247703(n,k).