Abundant Numbers
19th50th39th16th248th30th14th234th26th
Abundant Numbers (Long)
20th59th34th17th139th24th14th138th19th
Collatz
23rd49th42nd17th266th20th12th96th12th
Diamonds
32nd23rd
4th9th42nd13th
Divisors
20th66th36th22nd365th87th23rd854th50th
Evil Numbers
13th38th44th14th60th6th7th1st12th
Evil Numbers (Long)
13th44th39th13th83rd22nd13th49th8th
Farey Sequence
16th
11th
Fibonacci
30th
90th27th326th132nd
965th37th
Fizz Buzz
33rd64th72nd14th1,109th88th12th1,228th41st
Gijswijt’s Sequence
9th27th8th7th46th7th8th44th7th
Happy Numbers
13th
34th20th156th29th
15th
Happy Numbers (Long)
12th37th35th12th93rd23rd10th83rd10th
Leap Years
14th39th38th10th232nd28th7th193rd11th
Niven Numbers
16th48th46th21st211th36th1st263rd6th
Niven Numbers (Long)
19th48th38th18th143rd19th9th255th9th
Odious Numbers
14th36th42nd14th
6th7th1st13th
Odious Numbers (Long)
13th35th40th13th79th23rd13th1st8th
Pascal’s Triangle
15th53rd24th13th146th16th9th312th15th
Pernicious Numbers
39th
33rd1st86th24th
Pernicious Numbers (Long)
15th37th21st12th62nd15th3rd80th12th
Prime Numbers
17th57th51st19th222nd42nd21st463rd32nd
Prime Numbers (Long)
22nd46th31st15th124th27th10th206th18th
Sierpiński Triangle
6th32nd12th5th18th16th4th57th5th