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A254607
Number of tilings of a 7 X n rectangle using polyominoes of shape I.
2
1, 64, 9866, 2078716, 486248000, 117656540512, 28778500622048, 7063448084710944, 1735575086258267968, 426602245391808219456, 104870171042459607741312, 25780811901305515395438592, 6337913024506813766449064064, 1558108119479642808250383381248, 383044676600298851289615284801792
OFFSET
0,2
COMMENTS
A polyomino of shape I is a rectangle of width 1.
LINKS
Wikipedia, Polyomino
CROSSREFS
Column k=7 of A254414.
Sequence in context: A264146 A220731 A239403 * A236690 A362541 A268055
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Feb 02 2015
EXTENSIONS
Terms a(11) and beyond from Andrew Howroyd, Dec 23 2019
STATUS
approved