12 Days of Christmas
499th
99 Bottles of Beer
136th76th
Abundant Numbers
209th
Abundant Numbers (Long)
164th
Arithmetic Numbers
118th
Catalan Numbers
244th
Christmas Trees
324th
Collatz
316th
Divisors
262nd1st
Emirp Numbers
208th
Emirp Numbers (Long)
82nd
Evil Numbers
404th
Evil Numbers (Long)
314th
Farey Sequence
46th106th
Fizz Buzz
58th
Foo Fizz Buzz Bar
1st
Fractions
182nd
Happy Numbers
341st
Happy Numbers (Long)
203rd
ISBN
342nd
Kolakoski Sequence
244th
Leap Years
370th
Lucky Tickets
81st
Niven Numbers
147th
Niven Numbers (Long)
116th
Number Spiral
190th
Pangram Grep
60th
Pascal’s Triangle
1st
Pernicious Numbers
265th
Pernicious Numbers (Long)
161st
Prime Numbers
158th
Prime Numbers (Long)
52nd
Quine
72nd
Reverse Polish Notation
100th
Rule 110
51st197th
Sierpiński Triangle
335th
Tongue-twisters
377th
Vampire Numbers
228th
Van Eck Sequence
97th
π
397th6th