cibd 10.0: Program for Constructing cyclic IBDs of size (v,k,r)
(c) 2018 Design Computing (http://designcomputing.net/)

Note: Best cyclic IBD for v=8, k=4, r=35, b=70

Try	iter	E	E/U	Concurrences
1	0	0.857	1	15(7) 

Initial block(s) and the no. of blocks generated by each initial block for try 1 using seed 1533471896028:

0	4	7	6	 (8)
0	3	1	6	 (8)
0	2	1	3	 (8)
0	6	3	7	 (8)
0	6	2	5	 (8)
0	2	4	3	 (8)
0	6	3	7	 (8)
0	4	2	7	 (8)
0	3	4*	7*	 (4)
0	2*	4*	6*	 (2)

Plan (blocks are columns):

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

Note: cibd used 0.113 seconds.
Note: Evaluation copy - purchase at www.designcomputing.net