12 Days of Christmas
26th
99 Bottles of Beer
14th
Abundant Numbers
16th
Arabic to Roman
8th
Christmas Trees
17th
Diamonds
16th
Divisors
14th
Emirp Numbers
5th
Evil Numbers
46th
Fibonacci
57th
Fizz Buzz
732nd84th
Happy Numbers
11th
Leap Years
34th
Leyland Numbers
12th
Morse Decoder
10th
Morse Encoder
11th
Niven Numbers
15th
Odious Numbers
42nd
Ordinal Numbers
17th
Pangram Grep
20th
Pascal’s Triangle
19th
Pernicious Numbers
54th
Prime Numbers
33rd
Quine
1st
77th103rd
Roman to Arabic
Seven Segment
9th
Sierpiński Triangle
4th
Spelling Numbers
7th
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τ
φ
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10th