The following pictures show n tans with leg 1 packed inside the smallest known circle (of radius r).

1.

2.

3.

r = 1/√2 = .707+

Trivial.
r = 1/√2 = .707+

Trivial.
r = (6 + √2)/8 = .926+

Found by Serhiy Grabarchuk

in April 2005.

4.

5.

6.

r = 1

Trivial.
r = 1.125+

Found by Maurizio Morandi

in July 2007.
r = 1.198+

Found by Maurizio Morandi

in July 2007.

7.

8.

9.

r = 1.265+

Found by Maurizio Morandi

in August 2007.
r = √(1+1/√2) = 1.306+

Found by Serhiy Grabarchuk

in April 2005.
r = 1.377+

Found by David W. Cantrell

in August 2007.

10.

11.

12.

r = 1.428+

Found by Maurizio Morandi

in July 2007.
r = 1.480+

Found by David W. Cantrell

in August 2007.
r = 1.509+

Found by David W. Cantrell

in August 2007.

13.

14.

15.

r = 1.559+

Found by Serhiy Grabarchuk

in April 2005.
r = √10/2 = 1.581+

Found by Serhiy Grabarchuk

in April 2005.
r = 1.667+

Found by Maurizio Morandi

in July 2007.

16.

17.

18.

r = 1.746+

Found by David W. Cantrell

in August 2007.
r = 1.806+

Found by David W. Cantrell

in August 2007.
r = 1.834+

Found by David W. Cantrell

in August 2007.