The standard CN block reward schedule is calculated using the following formula:
Block Reward = (Total Supply of Coins - Already Generated Coins) / (2^emission speed factor)
In the mathematical expression,
BR = (T - A*(10^(number of decimals))) / (2^19) / (10^(number of decimals))
For example, let's try to calculate the block reward of the genesis block. - T = (2^64) - 1 = 18,446,744,073,709,551,615, a constant - A = 0, This is a genesis block, a varible - emission speed factor = 19, a constant - number of decimals = 8, a constant Block #1 (18,446,744,073,709,551,615 - 0) * (2^-19) * (10^-8) = 351,843.72088832 QWC For the next block, The calculation is as shown below Block #2 (18,446,744,073,709,551,615 - 35,184,372,088,832) * (2^-19) * (10^-8) = 351,843.72088831 QWC Block #3 (18,446,744,073,709,551,615 - 70,368,744,177,663) * (2^-19) * (10^-8) = 351,842.37871104 QWC Block #4 ... and so on.
The block reward decreases continuously until it reaches a point of tail emission, which is a constant number.
[Figure 5. Block Rewards and its reduction up to Block Height 2,000,000]
You can also download an excel calculation sheet for CN original block reward schedule from Qwertycoin Github repository.