Abundant Numbers
19th49th39th16th248th30th14th849th26th
Abundant Numbers (Long)
20th58th34th17th139th24th14th455th19th
Collatz
23rd48th42nd17th266th20th12th443rd12th
Diamonds
25th23rd
4th9th73rd13th
Divisors
20th66th36th22nd365th87th23rd1,284th50th
Evil Numbers
13th38th44th14th60th6th1st1st12th
Evil Numbers (Long)
13th43rd39th13th83rd22nd13th49th8th
Farey Sequence
16th
10th
Fibonacci
30th
90th27th326th132nd
965th37th
Fizz Buzz
33rd64th72nd14th1,109th88th12th1,588th41st
Gijswijt’s Sequence
9th26th8th7th42nd7th8th87th7th
Happy Numbers
13th
33rd20th154th29th
14th
Happy Numbers (Long)
12th36th35th12th93rd23rd10th249th10th
Leap Years
14th43rd38th10th232nd28th7th192nd11th
Niven Numbers
16th48th46th21st211th36th1st263rd1st
Niven Numbers (Long)
19th47th38th18th143rd19th9th400th9th
Odious Numbers
14th36th42nd14th
6th1st1st13th
Odious Numbers (Long)
13th35th40th13th79th23rd13th1st8th
Pascal’s Triangle
15th52nd24th13th146th16th9th512th15th
Pernicious Numbers
39th
33rd1st86th24th
Pernicious Numbers (Long)
15th35th21st12th62nd15th3rd106th12th
Prime Numbers
17th57th51st19th222nd42nd21st584th32nd
Prime Numbers (Long)
22nd46th31st15th124th27th10th208th18th
Sierpiński Triangle
5th26th12th5th18th16th4th88th5th