Ok, I looked at source code : block reward changes every week (10080 blocks) starting from block number 15000 (where genesiscoin hardforked I suppose).

So block reward will be :

12000 from block 75480 (60480 + 15000) to block 85559 (75480 + 10080 - 1).
9000 from block 85560 to block 95639
6000 from block 95640 to block 105719
3000 from block 105720 to block 115799

PoS from block 115800