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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 July 28 14:15 EDT 2021. Contains 346334 sequences. (Running on oeis4.)