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A220773 Number of tilings of a 7 X n rectangle using integer-sided rectangular tiles of equal area. 2
1, 2, 24, 12, 850, 7, 31777, 4, 1300180, 2877, 53175580, 9, 2189911837, 11, 90124167476, 972776, 3710809418140, 25, 152783310505831, 38, 6290664383805343, 329097191, 259009513044646014, 86, 10664385331038730694, 8709, 439092316687230373634, 111328277385 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..300
EXAMPLE
a(5) = 7:
._________. ._________. ._________. ._________.
| | | | | | | | |_________| |_________|
| | | | | | | | |_________| | | | | | |
| | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | | | | | | |
| | | | | | | | | | | | | | |_|_|_|_|_|
|_________| |_|_|_|_|_| |_|_|_|_|_| |_________|
._________. ._________. ._________.
| | | | | | |_________| |_|_|_|_|_|
| | | | | | |_________| |_|_|_|_|_|
| | | | | | |_________| |_|_|_|_|_|
| | | | | | |_________| |_|_|_|_|_|
|_|_|_|_|_| |_________| |_|_|_|_|_|
|_________| |_________| |_|_|_|_|_|
|_________| |_________| |_|_|_|_|_|
CROSSREFS
Column k=7 of A220777.
Sequence in context: A278563 A075267 A002743 * A290772 A342545 A055535
Adjacent sequences: A220770 A220771 A220772 * A220774 A220775 A220776
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Dec 19 2012
STATUS
approved

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Last modified August 30 10:20 EDT 2024. Contains 375542 sequences. (Running on oeis4.)