12 Days of Christmas
351st
99 Bottles of Beer
168th
Abundant Numbers
58th
Arrows
44th
CSS Colors
55th
Diamonds
163rd
Divisors
86th
Emirp Numbers
43rd
Evil Numbers
75th
134th
Fibonacci
174th
184th
Fizz Buzz
215th
1st
58th
Happy Numbers
46th
62nd
Leap Years
162nd70th
33rd
57th103rd
50th
314th
Leyland Numbers
105th
Lucky Tickets
52nd
Morse Decoder
79th
Morse Encoder
91st
Niven Numbers
1st
141st
Odious Numbers
74th
297th
Ordinal Numbers
68th
Pangram Grep
Pascal’s Triangle
66th
Pernicious Numbers
62nd
157th
Prime Numbers
1st
342nd
Quine
1st25th103rd1st82nd25th60th120th5th66th30th1st1st45th118th48th36th72nd41st110th
Rule 110
99th
Seven Segment
144th
Spelling Numbers
93rd
United States
λ
48th
64th
38th46th40th141st15th
π
51st
τ
49th
φ
73rd
√2
86th
𝑒
86th