Abundant Numbers
13th39th30th11th202nd23rd12th699th22nd
Abundant Numbers (Long)
14th41st25th12th101st17th12th343rd15th
Collatz
17th39th29th15th205th28th10th320th9th
Diamonds
Divisors
15th56th25th17th326th73rd18th1,135th45th
Evil Numbers
8th29th33rd10th50th5th1st1st8th
Evil Numbers (Long)
8th36th32nd9th59th14th10th33rd6th
Farey Sequence
12th
Fibonacci
23rd
Fizz Buzz
25th53rd57th10th994th83rd9th1,388th40th
Gijswijt’s Sequence
6th20th4th4th26th5th7th53rd6th
Happy Numbers
9th
Happy Numbers (Long)
8th31st25th10th72nd19th9th184th9th
Leap Years
9th34th25th7th180th18th4th140th8th
Niven Numbers
11th36th31st13th171st28th1st202nd1st
Niven Numbers (Long)
14th41st29th14th105th16th6th305th6th
Odious Numbers
9th28th33rd10th
Odious Numbers (Long)
7th27th32nd8th56th15th10th1st6th
Pascal’s Triangle
10th43rd14th8th117th16th7th425th12th
Pernicious Numbers
Pernicious Numbers (Long)
10th27th13th7th42nd11th2nd58th9th
Prime Numbers
12th44th39th14th186th33rd16th479th25th
Prime Numbers (Long)
15th36th25th11th92nd22nd7th149th11th
Sierpiński Triangle
2nd21st8th4th13th13th4th57th5th