12 Days of Christmas
29th
Abundant Numbers
34th
37th
Arabic to Roman
Divisors
1st
4th
Emirp Numbers
164th
80th
Evil Numbers
384th
58th
Fibonacci
178th
7th
Fizz Buzz
38th
3rd
Happy Numbers
162nd
30th
Leap Years
216th
47th
Look and Say
39th
10th
Niven Numbers
187th
28th
Odious Numbers
288th
50th
Pangram Grep
25th
Pernicious Numbers
313th
58th
Prime Numbers
148th
Quine
1st107th67th22nd78th
Recamán
224th
18th
Roman to Arabic
43rd
π
30th