Abundant Numbers
18th46th33rd15th234th25th13th218th24th
Abundant Numbers (Long)
19th49th28th16th126th20th13th124th16th
Collatz
21st46th33rd17th248th15th11th86th10th
Diamonds
29th19th
4th8th32nd11th
Divisors
19th63rd29th21st351st80th22nd821st47th
Evil Numbers
11th35th39th13th53rd6th6th1st10th
Evil Numbers (Long)
11th40th35th12th72nd20th12th41st7th
Farey Sequence
15th
10th
Fibonacci
28th
75th25th304th119th
904th34th
Fizz Buzz
30th61st64th14th1,072nd86th10th1,170th41st
Gijswijt’s Sequence
8th27th5th6th37th5th8th36th6th
Happy Numbers
13th
29th18th147th26th
14th
Happy Numbers (Long)
11th36th31st12th86th21st9th72nd9th
Leap Years
13th37th27th10th207th21st4th175th8th
Niven Numbers
15th43rd38th19th198th30th1st244th6th
Niven Numbers (Long)
19th47th33rd17th129th17th8th231st8th
Odious Numbers
13th33rd37th13th
6th6th1st11th
Odious Numbers (Long)
11th32nd35th12th68th21st12th1st7th
Pascal’s Triangle
14th51st19th12th133rd14th8th291st14th
Pernicious Numbers
31st
26th1st75th18th
Pernicious Numbers (Long)
15th35th14th10th53rd12th3rd66th10th
Prime Numbers
17th53rd47th18th207th37th20th439th29th
Prime Numbers (Long)
22nd43rd29th15th109th23rd9th191st16th
Sierpiński Triangle
5th31st9th4th14th14th4th47th5th