OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..17
Wikipedia, Polyomino
FORMULA
a(n) = A352589(n,n).
EXAMPLE
a(2) = 8:
.___. .___. .___. .___. .___. .___. .___. .___.
| | |_|_| |___| | | | |_|_| |___| |_| | | |_|
|___| |_|_| |___| |_|_| |___| |_|_| |_|_| |_|_| .
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, May 07 2022
STATUS
approved