To do
- add {{Classes of natural numbers}} to pernicious number and add that number class to the template
Done - add look-and-say sequence to {{Classes of natural numbers}}
- add Kolakoski sequence to {{Classes of natural numbers}}
- add Maris–McGwire–Sosa pair to {{Classes of natural numbers}}
- add Smith number to {{Classes of natural numbers}}
- add Sum-product number to {{Classes of natural numbers}}
- add Transposable integer to {{Classes of natural numbers}}
- add unitary perfect number to {{Classes of natural numbers}}