OFFSET
1,6
COMMENTS
The pennies are laid flat on a horizontal plane. - Daniel Forgues, Oct 10 2016
We might have a rigid structure with a hole through which we have a taut chain of pennies (is this considered a packing?). - Daniel Forgues, Oct 08 2016
EXAMPLE
Examples for n=2,3,4,5,6,7:
n=2:
.o.o
n=3:
..o
.o.o
n=4:
..o
.o.o
..o
n=5:
..o.o
.o.o.o
n=6:
.o.o.o
o.o.o
.
...o
o.o.o
.o.o
.
..o
.o.o
o.o.o
n=7:
..o.o.o
.o.o.o.o
.
..o.o
.o.o.o
..o.o
.
...o.o
..o.o
.o.o.o
.
....o.o
...o.o.o
..o.o
CROSSREFS
KEYWORD
nonn,more
AUTHOR
J. Lowell, Dec 12 2009
EXTENSIONS
Edited by N. J. A. Sloane, Dec 19 2009
STATUS
approved