Abundant Numbers
114th
Abundant Numbers (Long)
75th
Christmas Trees
115th
Collatz
120th
Divisors
244th
Emirp Numbers
89th
Evil Numbers
124th
Evil Numbers (Long)
67th
Fibonacci
255th
Fizz Buzz
1,137th
Foo Fizz Buzz Bar
33rd
Fractions
77th
Happy Numbers
89th
Happy Numbers (Long)
53rd
Leap Years
154th
Look and Say
41st
Niven Numbers
123rd
Niven Numbers (Long)
61st
Odious Numbers
196th
Ordinal Numbers
106th
Pascal’s Triangle
154th
Prime Numbers
229th
Recamán
99th