12 Days of Christmas
459th
99 Bottles of Beer
129th71st
Abundant Numbers
186th
Abundant Numbers (Long)
141st
Arithmetic Numbers
108th
Catalan Numbers
220th
Christmas Trees
300th
Collatz
283rd
Divisors
247th1st
Emirp Numbers
192nd
Emirp Numbers (Long)
66th
Evil Numbers
364th
Evil Numbers (Long)
278th
Farey Sequence
42nd90th
Fizz Buzz
54th
Foo Fizz Buzz Bar
1st
Fractions
167th
Happy Numbers
323rd
Happy Numbers (Long)
183rd
ISBN
322nd
Kolakoski Sequence
230th
Leap Years
346th
Lucky Tickets
67th
Niven Numbers
124th
Niven Numbers (Long)
101st
Number Spiral
173rd
Pangram Grep
51st
Pascal’s Triangle
1st
Pernicious Numbers
238th
Pernicious Numbers (Long)
141st
Prime Numbers
142nd
Prime Numbers (Long)
44th
Quine
63rd
Reverse Polish Notation
84th
Rule 110
48th184th
Sierpiński Triangle
320th
Tongue-twisters
349th
Vampire Numbers
202nd
Van Eck Sequence
77th
π
372nd6th24th