OFFSET
1,2
EXAMPLE
The a(3) = 21 possible sets of pieces that can tile a 3 X 3 square are given in the table below. (Each column on the right gives a set of pieces.)
.
length X width | number of pieces
---------------+------------------------------------------
3 X 3 | 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2 X 3 | 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
2 X 2 | 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0
1 X 3 | 0 1 0 0 1 1 0 0 0 3 2 2 1 1 1 1 0 0 0 0 0
1 X 2 | 0 0 1 0 1 0 2 1 0 0 1 0 3 2 1 0 4 3 2 1 0
1 X 1 | 0 0 1 3 0 2 1 3 5 0 1 3 0 2 4 6 1 3 5 7 9
CROSSREFS
KEYWORD
nonn,more
AUTHOR
Pontus von Brömssen, Feb 14 2023
STATUS
approved