12 Days of Christmas
118th
99 Bottles of Beer
78th
Abundant Numbers
21st
18th136th
Abundant Numbers (Long)
6th81st
Arithmetic Numbers
100th
Catalan Numbers
203rd
Catalan’s Constant
13th
Christmas Trees
3rd417th
Collatz
21st3rd
22nd3rd59th21st
14th5th
Day of Week
1st
Diamonds
54th
Divisors
166th
79th
13th70th163rd46th
2nd1st
Emirp Numbers
27th12th
Emirp Numbers (Long)
146th
Evil Numbers
78th61st
9th44th87th
26th286th
37th
Evil Numbers (Long)
10th
50th
17th188th
Factorial Factorisation
156th
Fibonacci
127th39th116th
44th
1st30th1st1st54th8th1st19th169th
Fizz Buzz
16th
74th196th
Foo Fizz Buzz Bar
40th16th
Fractions
72nd
12th95th
Happy Numbers
42nd
Happy Numbers (Long)
174th
Kolakoski Sequence
11th13th
Leap Years
21st
40th131st
Levenshtein Distance
161st
Leyland Numbers
15th304th
Niven Numbers
89th35th48th
26th28th116th33rd
20th127th
Niven Numbers (Long)
24th
15th96th
Odious Numbers
66th
8th
98th
23rd140th
Odious Numbers (Long)
43rd
8th
56th
16th139th
Ordinal Numbers
45th
Pangram Grep
22nd109th
Pascal’s Triangle
106th
Pernicious Numbers
25th
33rd83rd
Prime Numbers
112th
31st
149th
29th305th
Prime Numbers (Long)
203rd
Quine
130th
110th
63rd
Recamán
16th282nd
Reverse Polish Notation
51st
33rd
Sierpiński Triangle
181st
Van Eck Sequence
184th
𝑒
28th58th21st21st48th51st33rd15th26th45th36th14th27th22nd13th14th
20th370th32nd