12 Days of Christmas
501st
99 Bottles of Beer
136th76th
Abundant Numbers
209th
Abundant Numbers (Long)
164th
Arithmetic Numbers
118th
Catalan Numbers
246th
Christmas Trees
331st
Collatz
318th
Divisors
263rd1st
Emirp Numbers
210th
Emirp Numbers (Long)
82nd
Evil Numbers
406th
Evil Numbers (Long)
314th
Farey Sequence
47th106th
Fizz Buzz
58th
Foo Fizz Buzz Bar
1st
Fractions
184th
Happy Numbers
342nd
Happy Numbers (Long)
204th
ISBN
346th
Kolakoski Sequence
245th
Leap Years
372nd
Lucky Tickets
81st
Niven Numbers
148th
Niven Numbers (Long)
117th
Number Spiral
191st
Pangram Grep
61st
Pascal’s Triangle
1st
Pernicious Numbers
265th
Pernicious Numbers (Long)
162nd
Prime Numbers
159th
Prime Numbers (Long)
52nd
Quine
72nd
Reverse Polish Notation
100th
Rule 110
51st197th
Sierpiński Triangle
335th
Tongue-twisters
378th
Vampire Numbers
229th
Van Eck Sequence
97th
π
400th6th