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

0,5

Links

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

Wikipedia, Pentomino

Formula

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

Crossrefs

Cf. A174249, A233427, A247710.

Sequence in context: A034778 A060674 A233165 * A189346 A334713 A266210

Adjacent sequences: A247740 A247741 A247742 * A247744 A247745 A247746

Keyword

nonn

Author

Alois P. Heinz, Sep 23 2014

Status

approved