12 Days of Christmas
51st
99 Bottles of Beer
50th
Abundant Numbers
58th
Arrows
40th
CSS Colors
29th
Diamonds
163rd
Divisors
86th
Emirp Numbers
16th
Evil Numbers
76th
135th
Fibonacci
175th
186th
Fizz Buzz
217th
1st
209th
Happy Numbers
17th
49th
Leap Years
162nd76th
36th
58th105th
50th
322nd
Leyland Numbers
20th
Lucky Tickets
23rd
Morse Decoder
50th
Morse Encoder
44th
Niven Numbers
1st
144th
Odious Numbers
76th
301st
Ordinal Numbers
69th
Pangram Grep
Pascal’s Triangle
66th
Pernicious Numbers
62nd
160th
Prime Numbers
1st
345th
Quine
1st24th96th1st83rd25th61st122nd5th67th30th1st1st45th120th48th36th72nd43rd79th
Rule 110
60th
Seven Segment
82nd
Spelling Numbers
18th
United States
λ
48th
27th
38th47th41st152nd15th
π
51st
τ
49th
φ
72nd
√2
84th
𝑒
86th