CIBD 6.0: Construct a cyclic IBD of size (v,k,r)
(c) 2007 Design Computing (designcomputing.net/)

Note: Best cyclic IBD for v=7, k=3, r=15, b=35.

try #     	1
seed      	1200632073093
# of iterations	1
E         	0.7778
E/U       	1
concurrences	5(6) 

Initial block(s) and the # of blocks generated by each initial block:

0	2	4	 (7)
0	3	1	 (7)
0	6	5	 (7)
0	3	4	 (7)
0	1	3	 (7)

Plan (blocks are columns):

6	2	4	5	3	0	1	
1	4	6	0	5	2	3	
3	6	1	2	0	4	5	

6	3	1	0	2	4	5	
2	6	4	3	5	0	1	
0	4	2	1	3	5	6	

2	6	5	0	1	4	3	
1	5	4	6	0	3	2	
0	4	3	5	6	2	1	

3	6	1	2	0	4	5	
6	2	4	5	3	0	1	
0	3	5	6	4	1	2	

3	2	6	5	0	1	4	
4	3	0	6	1	2	5	
6	5	2	1	3	4	0	

Note: The order of treatments within each block is not randomized.
Note: CIBD used 0.015 seconds.