Abundant Numbers
12th
38th
30th
11th
202nd
23rd
12th
177th
22nd
Abundant Numbers (Long)
13th
40th
25th
12th
100th
17th
12th
90th
15th
Collatz
14th
38th
29th
15th
201st
28th
10th
66th
9th
Diamonds
Divisors
14th
54th
25th
17th
324th
73rd
18th
730th
44th
Evil Numbers
7th
29th
33rd
10th
50th
5th
5th
1st
9th
Evil Numbers (Long)
7th
35th
32nd
9th
59th
14th
10th
32nd
6th
Farey Sequence
10th
Fibonacci
19th
Fizz Buzz
24th
51st
56th
10th
986th
83rd
9th
1,043rd
40th
Gijswijt’s Sequence
5th
21st
4th
4th
28th
5th
7th
26th
6th
Happy Numbers
8th
Happy Numbers (Long)
7th
31st
25th
10th
72nd
19th
9th
53rd
9th
Leap Years
9th
31st
24th
7th
179th
17th
4th
140th
8th
Niven Numbers
10th
35th
31st
12th
171st
28th
1st
203rd
6th
Niven Numbers (Long)
13th
40th
29th
14th
105th
15th
6th
179th
6th
Odious Numbers
6th
28th
33rd
10th
Odious Numbers (Long)
6th
27th
32nd
8th
55th
15th
10th
1st
6th
Pascal’s Triangle
9th
42nd
14th
8th
117th
16th
7th
242nd
12th
Pernicious Numbers
Pernicious Numbers (Long)
8th
29th
13th
7th
42nd
11th
2nd
43rd
9th
Prime Numbers
11th
43rd
39th
14th
186th
33rd
16th
373rd
25th
Prime Numbers (Long)
14th
34th
25th
11th
91st
22nd
7th
145th
11th
Sierpiński Triangle
2nd
25th
9th
4th
13th
13th
4th
36th
5th