OFFSET
1,2
FORMULA
EXAMPLE
Triangle begins:
n\k| 1 2 3 4 5 6
---+-------------------
1 | 1
2 | 2 4
3 | 3 7 9
4 | 4 11 18 23
5 | 4 14 22 34 41
6 | 6 23 42 72 108 ?
The T(3,3) = 9 nonrearrangeable tilings of the 3 X 3 square are:
+---+---+---+ +---+---+---+ +---+---+---+
| | | | | | |
+ + +---+---+---+ +---+---+---+
| | | | | |
+ + + + + +
| | | | | |
+---+---+---+ +---+---+---+ +---+---+---+
.
+---+---+---+ +---+---+---+ +---+---+---+
| | | | | | | | | | |
+---+---+---+ +---+---+ + +---+---+ +
| | | | | | | |
+ + + + + + + +
| | | | | | | |
+---+---+---+ +---+---+---+ +---+---+---+
.
+---+---+---+ +---+---+---+ +---+---+---+
| | | | | | | | | |
+---+---+---+ +---+---+---+ +---+---+---+
| | | | | | | | |
+ +---+ +---+---+---+ +---+---+---+
| | | | | | | | |
+---+---+---+ +---+---+---+ +---+---+---+
CROSSREFS
KEYWORD
AUTHOR
Pontus von Brömssen, Feb 28 2023
STATUS
approved