12 Days of Christmas
493rd
99 Bottles of Beer
127th155th
Abundant Numbers
241st
Abundant Numbers (Long)
171st
Arithmetic Numbers
128th
Catalan Numbers
232nd
Christmas Trees
326th
Collatz
321st
Divisors
248th109th
Emirp Numbers
234th
Emirp Numbers (Long)
91st
Evil Numbers
375th
Evil Numbers (Long)
290th
Farey Sequence
42nd105th
Fizz Buzz
201st
Foo Fizz Buzz Bar
123rd
Fractions
198th
Happy Numbers
339th
Happy Numbers (Long)
202nd
ISBN
326th
Kolakoski Sequence
237th
Leap Years
361st
Lucky Tickets
87th
Niven Numbers
129th
Niven Numbers (Long)
118th
Number Spiral
181st
Pangram Grep
109th
Pascal’s Triangle
41st
Pernicious Numbers
251st
Pernicious Numbers (Long)
151st
Prime Numbers
145th
Prime Numbers (Long)
48th
Quine
63rd
Reverse Polish Notation
109th
Rule 110
48th201st
Sierpiński Triangle
319th
Tongue-twisters
361st
Vampire Numbers
214th
Van Eck Sequence
97th
π
382nd6th25th