12 Days of Christmas
474th
99 Bottles of Beer
131st72nd
Abundant Numbers
196th
Abundant Numbers (Long)
150th
Arithmetic Numbers
111th
Catalan Numbers
228th
Christmas Trees
307th
Collatz
299th
Divisors
249th1st
Emirp Numbers
195th
Emirp Numbers (Long)
68th
Evil Numbers
378th
Evil Numbers (Long)
294th
Farey Sequence
42nd94th
Fizz Buzz
54th
Foo Fizz Buzz Bar
1st
Fractions
172nd
Happy Numbers
330th
Happy Numbers (Long)
190th
ISBN
329th
Kolakoski Sequence
235th
Leap Years
356th
Lucky Tickets
70th
Niven Numbers
131st
Niven Numbers (Long)
106th
Number Spiral
178th
Pangram Grep
52nd
Pascal’s Triangle
1st
Pernicious Numbers
249th
Pernicious Numbers (Long)
149th
Prime Numbers
146th
Prime Numbers (Long)
48th
Quine
64th
Reverse Polish Notation
89th
Rule 110
48th187th
Sierpiński Triangle
325th
Tongue-twisters
353rd
Vampire Numbers
208th
Van Eck Sequence
84th
π
379th6th