A273477 Number of tilings of a 7 X n rectangle using pentominoes of shapes W, U, X and monominoes.

1, 1, 23, 1086, 13097, 261110, 5732276, 105028302, 2057123951, 40750196324, 789214306848, 15416490294168, 301533431477968, 5881271193704355, 114836714153318686, 2242611029205195253, 43780084385383228801, 854790034707804119211, 16689735991827528511674

Offset: 0

Author

Alois P. Heinz, May 23 2016

Keywords

• nonn

Links

• Alois P. Heinz, Table of n, a(n) for n = 0..775
• Wikipedia, Pentomino

Crossrefs

Cf. A264765.