12 Days of Christmas
464th
99 Bottles of Beer
129th71st
Abundant Numbers
189th
Abundant Numbers (Long)
142nd
Arithmetic Numbers
108th
Catalan Numbers
224th
Christmas Trees
301st
Collatz
286th
Divisors
248th1st
Emirp Numbers
194th
Emirp Numbers (Long)
66th
Evil Numbers
368th
Evil Numbers (Long)
282nd
Farey Sequence
42nd93rd
Fizz Buzz
54th
Foo Fizz Buzz Bar
1st
Fractions
170th
Happy Numbers
324th
Happy Numbers (Long)
185th
ISBN
324th
Kolakoski Sequence
233rd
Leap Years
349th
Lucky Tickets
69th
Niven Numbers
127th
Niven Numbers (Long)
103rd
Number Spiral
173rd
Pangram Grep
52nd
Pascal’s Triangle
1st
Pernicious Numbers
244th
Pernicious Numbers (Long)
144th
Prime Numbers
144th
Prime Numbers (Long)
47th
Quine
63rd
Reverse Polish Notation
86th
Rule 110
48th185th
Sierpiński Triangle
323rd
Tongue-twisters
351st
Vampire Numbers
206th
Van Eck Sequence
81st
π
374th6th24th