Abundant Numbers
18th45th33rd15th234th25th13th807th24th
Abundant Numbers (Long)
19th48th28th16th126th20th13th424th16th
Collatz
21st45th33rd17th248th15th11th412th10th
Diamonds
22nd19th
4th8th55th11th
Divisors
19th63rd29th21st351st80th22nd1,246th47th
Evil Numbers
11th35th39th13th53rd6th1st1st10th
Evil Numbers (Long)
11th39th35th12th72nd20th12th41st7th
Farey Sequence
15th
9th
Fibonacci
28th
75th25th304th119th
904th34th
Fizz Buzz
30th61st64th14th1,072nd86th10th1,525th41st
Gijswijt’s Sequence
8th26th5th6th32nd5th8th69th6th
Happy Numbers
13th
28th18th145th26th
13th
Happy Numbers (Long)
11th35th31st12th85th21st9th223rd9th
Leap Years
13th40th27th10th207th21st4th174th8th
Niven Numbers
15th43rd38th19th198th30th1st244th1st
Niven Numbers (Long)
19th46th33rd17th129th17th8th370th8th
Odious Numbers
13th33rd37th13th
6th1st1st11th
Odious Numbers (Long)
11th32nd35th12th68th21st12th1st7th
Pascal’s Triangle
14th50th19th12th133rd14th8th484th14th
Pernicious Numbers
31st
26th1st75th18th
Pernicious Numbers (Long)
15th33rd14th10th53rd12th3rd90th10th
Prime Numbers
17th53rd47th18th207th37th20th553rd29th
Prime Numbers (Long)
22nd43rd29th15th110th23rd9th192nd16th
Sierpiński Triangle
4th25th8th4th14th14th4th76th5th