A247743 Total number of W shapes in all tilings of a 5 X n rectangle with pentominoes of any shape.

0, 0, 0, 0, 48, 528, 4752, 44080, 408192, 3738692, 32818416, 282587664, 2417602560, 20523442012, 172798010156, 1443679767220, 11992713950224, 99165736820120, 816514750434924, 6697254233908596, 54745726513283448, 446174778295639204, 3626566397497170096

Offset: 0

Author

Alois P. Heinz, Sep 23 2014

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..500
• Wikipedia, Pentomino

Crossrefs

Cf. A174249, A233427, A247710.

Formula

a(n) = Sum_{k>0} k * A247710(n,k).