OFFSET
1,2
COMMENTS
A size-n staircase polynomo is a polyomino consisting of n left-aligned rows in increasing length of 1, 2, ..., n. Rotations of staircase polyominoes are also polyominoes.
LINKS
Code Golf Stack Exchange user "Bubbler", Tiling a staircase with staircases.
EXAMPLE
For n = 3 the a(3) = 8 tilings are:
+---+ +---+ +---+ +---+
| | | | | | | |
+---+---+ + +---+ +---+---+ +---+---+
| | | | | | | | | | |
+---+---+---+, +---+---+---+, + +---+---+, +---+ +---+,
| | | | | | | | | | | | | |
+---+---+---+ +---+---+---+ +---+---+---+ +---+---+---+
+---+ +---+ +---+ +---+
| | | | | | | |
+---+---+ +---+---+ +---+---+ + +---+
| | | | | | | | |
+---+ +---+, + +---+---+, +---+ +---+, + +---+.
| | | | | | | | | | | | |
+---+---+---+ +---+---+---+ +---+---+---+ +---+---+---+
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Peter Kagey, Sep 08 2020
EXTENSIONS
a(8) from Seiichi Manyama, Sep 09 2020
a(9)-a(10) from Bert Dobbelaere, Sep 12 2020
STATUS
approved