A219990 Number of tilings of a 7 X n rectangle using dominoes and right trominoes.

1, 0, 117, 1984, 96139, 2746048, 100578811, 3238675344, 111496884663, 3704964324320, 125449223494157, 4205142104025144, 141722416759943105, 4762489676605782896, 160291284486676070239, 5390369708368427166312, 181353331398435867957049, 6099936611677114512527724

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