Abundant Numbers
13th40th30th12th207th23rd12th188th22nd
Abundant Numbers (Long)
15th42nd25th13th103rd18th12th102nd15th
Collatz
16th41st30th16th207th29th10th72nd9th
Diamonds
24th18th
4th7th30th9th
Divisors
15th56th26th18th331st76th18th748th45th
Evil Numbers
9th29th34th11th51st6th6th1st9th
Evil Numbers (Long)
9th37th32nd10th61st14th10th32nd6th
Farey Sequence
13th
7th
Fibonacci
22nd
66th21st279th101st
814th31st
Fizz Buzz
26th53rd58th10th1,008th83rd9th1,085th40th
Gijswijt’s Sequence
7th23rd4th4th32nd5th7th27th6th
Happy Numbers
9th
27th16th134th27th
12th
Happy Numbers (Long)
8th33rd27th11th75th22nd9th58th9th
Leap Years
9th32nd26th7th187th19th4th148th8th
Niven Numbers
13th37th33rd15th174th28th1st212th6th
Niven Numbers (Long)
16th42nd30th15th107th16th6th191st6th
Odious Numbers
10th28th33rd11th
6th6th1st9th
Odious Numbers (Long)
9th27th32nd10th58th15th10th1st6th
Pascal’s Triangle
11th44th15th9th121st16th7th255th13th
Pernicious Numbers
27th
25th1st59th14th
Pernicious Numbers (Long)
10th30th13th8th44th11th2nd47th9th
Prime Numbers
13th45th41st15th189th34th16th390th25th
Prime Numbers (Long)
17th36th26th12th94th22nd7th157th12th
Sierpiński Triangle
2nd27th9th4th13th13th4th37th5th