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A219990 Number of tilings of a 7 X n rectangle using dominoes and right trominoes. 2
1, 0, 117, 1984, 96139, 2746048, 100578811, 3238675344, 111496884663, 3704964324320, 125449223494157, 4205142104025144, 141722416759943105, 4762489676605782896, 160291284486676070239, 5390369708368427166312, 181353331398435867957049, 6099936611677114512527724 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..300

Vaclav Kotesovec, G.f. for A219990

FORMULA

G.f.: see link above. - Vaclav Kotesovec, Dec 03 2012

CROSSREFS

Column k=7 of A219987.

Sequence in context: A233376 A233051 A278774 * A223749 A218416 A027511

Adjacent sequences: A219987 A219988 A219989 * A219991 A219992 A219993

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Dec 02 2012

STATUS

approved

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Last modified February 1 17:37 EST 2023. Contains 359993 sequences. (Running on oeis4.)