Abundant Numbers
17th45th33rd15th233rd25th12th802nd23rd
Abundant Numbers (Long)
19th47th28th16th125th20th12th420th16th
Collatz
21st45th32nd17th247th15th11th408th10th
Diamonds
22nd19th
4th8th55th11th
Divisors
19th63rd29th21st350th80th22nd1,241st47th
Evil Numbers
11th34th39th13th53rd6th1st1st10th
Evil Numbers (Long)
11th39th35th12th71st19th12th40th7th
Farey Sequence
15th
9th
Fibonacci
27th
75th25th303rd118th
900th34th
Fizz Buzz
30th61st64th14th1,072nd86th10th1,517th41st
Gijswijt’s Sequence
8th25th5th6th32nd5th8th68th6th
Happy Numbers
13th
28th18th144th26th
13th
Happy Numbers (Long)
11th35th31st12th83rd21st9th223rd9th
Leap Years
13th40th27th10th207th21st4th174th8th
Niven Numbers
15th43rd38th18th198th30th1st244th1st
Niven Numbers (Long)
19th46th33rd17th129th17th8th368th8th
Odious Numbers
13th32nd37th13th
6th1st1st11th
Odious Numbers (Long)
11th31st35th12th68th20th12th1st7th
Pascal’s Triangle
14th50th19th12th133rd14th8th484th14th
Pernicious Numbers
31st
26th1st75th18th
Pernicious Numbers (Long)
15th33rd14th10th53rd12th3rd90th10th
Prime Numbers
17th53rd47th17th207th37th18th551st29th
Prime Numbers (Long)
22nd43rd29th15th110th23rd8th189th16th
Sierpiński Triangle
4th25th8th4th14th14th4th72nd5th