12 Days of Christmas
550th
99 Bottles of Beer
337th
Abundant Numbers
147th
Abundant Numbers (Long)
95th
Arithmetic Numbers
155th
Catalan Numbers
1st
Christmas Trees
169th
Collatz
105th
47th106th43rd
Day of Week
111th
Diamonds
182nd
Divisors
118th
Emirp Numbers
287th
Emirp Numbers (Long)
138th
Evil Numbers
253rd
Evil Numbers (Long)
164th
Fibonacci
56th
163rd
67th
Fizz Buzz
211th
Foo Fizz Buzz Bar
133rd
Fractions
134th
Gijswijt’s Sequence
112th
Happy Numbers
100th
Happy Numbers (Long)
183rd
Intersection
118th
Inventory Sequence
82nd
ISBN
122nd
Kolakoski Sequence
127th
Leap Years
55th
20th
Levenshtein Distance
151st
Leyland Numbers
240th
10th
ln 2
119th
Look and Say
323rd
Lucky Numbers
199th
Lucky Tickets
115th
Medal Tally
8th71st
Niven Numbers
76th
Niven Numbers (Long)
60th
Number Spiral
148th
Odious Numbers
257th
Odious Numbers (Long)
155th
Ordinal Numbers
128th
Pangram Grep
117th
Pascal’s Triangle
257th
Pernicious Numbers
77th
Pernicious Numbers (Long)
93rd
Prime Numbers
363rd
Prime Numbers (Long)
227th
Recamán
153rd
Reverse Polish Notation
1st
Seven Segment
353rd
Smith Numbers
152nd
Sudoku (Fill-in)
61st
Tongue-twisters
225th
United States
295th
Van Eck Sequence
154th
Zodiac Signs
106th
𝑒
247th