Abundant Numbers
13th39th30th12th207th23rd12th724th22nd
Abundant Numbers (Long)
15th41st25th13th103rd18th12th356th15th
Collatz
16th40th30th16th207th29th10th337th9th
Diamonds
22nd18th
4th7th46th9th
Divisors
15th56th26th18th331st76th18th1,157th45th
Evil Numbers
9th29th34th11th51st6th1st1st8th
Evil Numbers (Long)
9th36th32nd10th61st14th10th32nd6th
Farey Sequence
13th
7th
Fibonacci
22nd
66th21st279th101st
814th31st
Fizz Buzz
26th53rd58th10th1,008th83rd9th1,420th40th
Gijswijt’s Sequence
7th22nd4th4th29th5th7th55th6th
Happy Numbers
9th
26th16th132nd27th
11th
Happy Numbers (Long)
8th32nd27th11th74th22nd9th190th9th
Leap Years
9th34th26th7th187th19th4th147th8th
Niven Numbers
13th37th33rd15th174th28th1st212th1st
Niven Numbers (Long)
16th41st30th15th107th16th6th318th6th
Odious Numbers
10th28th33rd11th
6th1st1st8th
Odious Numbers (Long)
9th27th32nd10th58th15th10th1st6th
Pascal’s Triangle
11th43rd15th9th121st16th7th432nd13th
Pernicious Numbers
27th
25th1st59th14th
Pernicious Numbers (Long)
10th28th13th8th44th11th2nd62nd9th
Prime Numbers
13th45th41st15th189th34th16th493rd25th
Prime Numbers (Long)
17th36th26th12th94th22nd7th156th12th
Sierpiński Triangle
2nd22nd8th4th13th13th4th59th5th