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

0,3

Links

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

Wikipedia, Pentomino

Crossrefs

Cf. A264765.

Sequence in context: A042012 A128404 A126741 * A202656 A367772 A340487

Adjacent sequences: A273474 A273475 A273476 * A273478 A273479 A273480

Keyword

nonn

Author

Alois P. Heinz, May 23 2016

Status

approved