Abundant Numbers
17th46th33rd15th233rd25th12th217th23rd
Abundant Numbers (Long)
19th48th28th16th125th20th12th123rd16th
Collatz
21st46th32nd17th247th15th11th86th10th
Diamonds
29th19th
4th8th32nd11th
Divisors
19th63rd29th21st350th80th22nd819th47th
Evil Numbers
11th35th39th13th53rd6th6th1st10th
Evil Numbers (Long)
11th40th35th12th71st19th12th40th7th
Farey Sequence
15th
9th
Fibonacci
27th
75th25th303rd118th
900th34th
Fizz Buzz
30th61st64th14th1,072nd86th10th1,164th41st
Gijswijt’s Sequence
8th26th5th6th37th5th8th35th6th
Happy Numbers
13th
29th18th146th26th
14th
Happy Numbers (Long)
11th36th31st12th84th21st9th72nd9th
Leap Years
13th37th27th10th207th21st4th175th8th
Niven Numbers
15th43rd38th18th198th30th1st244th6th
Niven Numbers (Long)
19th47th33rd17th129th17th8th230th8th
Odious Numbers
13th32nd37th13th
6th6th1st11th
Odious Numbers (Long)
11th31st35th12th68th20th12th1st7th
Pascal’s Triangle
14th51st19th12th133rd14th8th291st14th
Pernicious Numbers
31st
26th1st75th18th
Pernicious Numbers (Long)
15th35th14th10th53rd12th3rd65th10th
Prime Numbers
17th53rd47th17th207th37th18th438th29th
Prime Numbers (Long)
22nd43rd29th15th110th23rd8th188th16th
Sierpiński Triangle
5th31st9th4th14th14th4th46th5th