Block rewards

4 weeks / 1 coin
2 weeks / 25 coins
6 weeks / 12.5 coins
6 weeks / 6.25 coins
6 weeks / 3.125 coins
6 weeks / 1.5625 coins
And finally, 1 coin

Comments please if you think starting with 25 coins is too much.
It is still easy to lower it by one step.