Abundant Numbers
Abundant Numbers (Long)
Catalan Numbers
23rd
Christmas Trees
112th
Divisors
1st
Emirp Numbers
1,543rd5th
Evil Numbers
157th
Fibonacci
Happy Numbers
Leap Years
2,688th
Niven Numbers
Niven Numbers (Long)
Odious Numbers
Pernicious Numbers
Prime Numbers
1st
Prime Numbers (Long)
1st
Quine
245th