Abundant Numbers
107th
Abundant Numbers (Long)
69th
Christmas Trees
112th
Collatz
109th
Divisors
237th
Emirp Numbers
85th
Evil Numbers
120th
Evil Numbers (Long)
64th
Fibonacci
243rd
Fizz Buzz
1,116th
Foo Fizz Buzz Bar
33rd
Fractions
75th
Happy Numbers
88th
Happy Numbers (Long)
51st
Leap Years
145th
Look and Say
40th
Niven Numbers
115th
Niven Numbers (Long)
58th
Odious Numbers
191st
Ordinal Numbers
103rd
Pascal’s Triangle
147th
Prime Numbers
221st
Recamán
96th