12 Days of Christmas
30th
99 Bottles of Beer
26th282nd
Abundant Numbers
45th
22nd
15th60th
Abundant Numbers (Long)
6th34th
Arithmetic Numbers
84th
Arrows
326th
Catalan Numbers
226th
Catalan’s Constant
13th
Christmas Trees
3rd231st
Collatz
19th3rd
26th39th69th18th
14th40th
Day of Week
1st
Diamonds
135th
Divisors
53rd
64th
13th91st171st47th
2nd1st
Emirp Numbers
16th118th
Emirp Numbers (Long)
161st
Evil Numbers
81st70th
10th61st95th
27th328th
49th
Evil Numbers (Long)
11th
59th
17th220th
Factorial Factorisation
190th
Fibonacci
131st44th130th
53rd
1st86th1st1st44th9th1st22nd190th
Fizz Buzz
16th
76th63rd
Foo Fizz Buzz Bar
41st1st
Fractions
81st
12th195th
Happy Numbers
71st
Happy Numbers (Long)
181st
Hilbert Curve
10th
Kolakoski Sequence
11th20th
Leap Years
24th
45th151st
Levenshtein Distance
154th
Leyland Numbers
15th331st
Morse Encoder
68th
Niven Numbers
65th38th56th
31st47th132nd33rd
21st154th
Niven Numbers (Long)
27th
16th101st
Odious Numbers
72nd
10th
107th
24th161st
Odious Numbers (Long)
53rd
10th
64th
17th165th
Ordinal Numbers
117th
Pangram Grep
24th63rd
Pascal’s Triangle
89th
Pernicious Numbers
32nd
33rd97th
Prime Numbers
118th
34th
162nd
34th340th
Prime Numbers (Long)
206th
Quine
138th
118th
81st
Recamán
17th301st
Reverse Polish Notation
54th
97th
Seven Segment
180th
Sierpiński Triangle
188th
Van Eck Sequence
197th
𝑒
29th61st23rd10th53rd59th33rd14th31st49th36th16th27th23rd11th14th
22nd409th43rd