(city population * 1.1) + (capital population * .15) - 1
For each city connected to the capital, not including the capital.
The Machu Pichu wonder increases the modifier by 20%, to (population * 1.3) + (capital population * .15) - 1.
Arabia increases the constant by 1, to (population * 1.1) + (capital population * .15) - 0.
For each city connected to the capital, not including the capital.
The Machu Pichu wonder increases the modifier by 20%, to (population * 1.3) + (capital population * .15) - 1.
Arabia increases the constant by 1, to (population * 1.1) + (capital population * .15) - 0.