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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

A polyomino of shape I is a rectangle of width 1.

LINKS

Andrew Howroyd, Table of n, a(n) for n = 0..200

Wikipedia, Polyomino

CROSSREFS

Column k=7 of A254414.

Sequence in context: A264146 A220731 A239403 * A236690 A268055 A268078

Adjacent sequences:  A254604 A254605 A254606 * A254608 A254609 A254610

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Feb 02 2015

EXTENSIONS

Terms a(11) and beyond from Andrew Howroyd, Dec 23 2019

STATUS

approved

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Last modified March 6 00:22 EST 2021. Contains 341835 sequences. (Running on oeis4.)