12 Days of Christmas
521st
99 Bottles of Beer
137th93rd
Abundant Numbers
221st
Abundant Numbers (Long)
172nd
Arithmetic Numbers
128th
Catalan Numbers
261st
Christmas Trees
351st
Collatz
334th
Divisors
269th1st
Emirp Numbers
219th
Emirp Numbers (Long)
89th
Evil Numbers
419th
Evil Numbers (Long)
333rd
Farey Sequence
50th118th
Fizz Buzz
68th
Foo Fizz Buzz Bar
1st
Fractions
199th
Happy Numbers
355th
Happy Numbers (Long)
212th
ISBN
360th
Kolakoski Sequence
260th
Leap Years
389th
Lucky Tickets
88th
Niven Numbers
158th
Niven Numbers (Long)
125th
Number Spiral
202nd
Pangram Grep
65th
Pascal’s Triangle
1st
Pernicious Numbers
280th
Pernicious Numbers (Long)
171st
Prime Numbers
176th
Prime Numbers (Long)
64th
Quine
83rd
Reverse Polish Notation
107th
Rule 110
52nd205th
Sierpiński Triangle
349th
Tongue-twisters
390th
Vampire Numbers
236th
Van Eck Sequence
106th
π
413th6th