OFFSET
0,9
COMMENTS
EXAMPLE
The 5th triangle of the sequence, the number of fixed pentominoes by dimension, is
0,0,0,0,1
0,0,6,12
0,6,25
0,12
1
This indicates, for example, there are 25 fixed pentominos that fit in a 3 X 3 rectangle and 12 fixed pentominos that fit in a 4 X 2 rectangle.
CROSSREFS
KEYWORD
nonn
AUTHOR
Graeme McRae, Jan 18 2007
STATUS
approved