Abundant Numbers
101st
Abundant Numbers (Long)
62nd
Christmas Trees
107th
Collatz
95th
Divisors
223rd
Emirp Numbers
81st
Evil Numbers
112th
Evil Numbers (Long)
55th
Fibonacci
225th
Fizz Buzz
1,057th
Foo Fizz Buzz Bar
31st
Fractions
67th
Happy Numbers
83rd
Happy Numbers (Long)
48th
Leap Years
136th
Look and Say
40th
Niven Numbers
102nd
Niven Numbers (Long)
51st
Odious Numbers
177th
Ordinal Numbers
97th
Pascal’s Triangle
136th
Prime Numbers
208th
Recamán
89th