A220771 Number of tilings of a 5 X n rectangle using integer-sided rectangular tiles of equal area.

1, 2, 11, 7, 115, 4, 1225, 7, 15242, 134, 185941, 14, 2342936, 23, 29253223, 3685, 367191322, 63, 4602885566, 109, 57743314072, 109863, 724240366265, 328, 9084849245294, 575, 113956161829517, 3301910, 1429442003678258, 1760, 17930520656581330, 3087

Offset

0,2

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Example

a(3) = 7:
._____. ._____. ._____. ._____. ._____. ._____. ._____.
|     | | | | | |_____| |_____| |_____| | | | | |_|_|_|
|     | | | | | |_____| |_____| | | | | | | | | |_|_|_|
|     | | | | | |_____| | | | | | | | | |_|_|_| |_|_|_|
|     | | | | | |_____| | | | | |_|_|_| |_____| |_|_|_|
|_____| |_|_|_| |_____| |_|_|_| |_____| |_____| |_|_|_|

Crossrefs

Column k=5 of A220777.

Sequence in context: A344776 A368640 A290572 * A277055 A009258 A009204

Adjacent sequences: A220768 A220769 A220770 * A220772 A220773 A220774

Keyword

nonn

Author

Alois P. Heinz, Dec 19 2012

Status

approved