12 Days of Christmas
21st15th
6th168th14th
Abundant Numbers
40th16th245th53rd17th894th26th
Abundant Numbers (Long)
34th17th137th41st17th477th19th
Arithmetic Numbers
12th13th127th38th15th460th14th
Arrows
6th7th
6th8th78th7th
ASCII Table
20th
91st32nd11th310th12th
Collatz
42nd18th265th28th15th495th12th
Divisors
34th19th364th87th22nd1,280th50th
Evil Numbers
45th15th63rd30th18th156th13th
Evil Numbers (Long)
40th11th44th22nd8th180th8th
Farey Sequence
11th
Fibonacci
83rd37th324th161st
959th24th
Fizz Buzz
72nd27th1,150th227th51st1,792nd71st
Leap Years
37th10th231st33rd5th190th10th
Niven Numbers
46th27th208th41st
297th33rd
Niven Numbers (Long)
38th16th141st18th18th398th16th
Odious Numbers
44th15th56th29th15th117th14th
Odious Numbers (Long)
41st11th40th23rd8th99th7th
Pascal’s Triangle
23rd14th136th15th9th469th15th
Pernicious Numbers
37th7th54th28th1st85th24th
Prime Numbers
47th
40th24th352nd32nd
Prime Numbers (Long)
32nd
126th26th10th205th18th