OFFSET
0,3
LINKS
Alois P. Heinz, Table of n, a(n) for n = 0..1000
Wikipedia, Pentomino
EXAMPLE
a(4) = 19 = 13 + 4 + 2 = A249762(4) + 4 + 2:
._______. ._______.
|_____. | | ._____|
| | ._|_| |_| ._. |
| | |_. | | |_| |_|
| |___| | |_____| |
|___|___| (4) |_______| (2) .
CROSSREFS
KEYWORD
nonn
AUTHOR
Alois P. Heinz, Dec 05 2014
STATUS
approved