OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1000
Wikipedia, Pentomino
EXAMPLE
a(3) = 7:
._____. ._____. ._____. ._____. ._____. ._____. ._____.
|_. | | | | | | | | | | | | | | | | | | ._|
| |___| | | ._| | | | | | |_. | |_. | | | ._| | |___| |
| .___| | |_| | | | | | | | |_| | |_| | |_| | | |___. |
|_| | | | | | | | | | | | | | | | | | | |_|
|_____| |_|___| |_|_|_| |_|___| |___|_| |___|_| |_____| .
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Nov 24 2014
STATUS
approved