Abundant Numbers
16th45th31st14th228th24th12th211th23rd
Abundant Numbers (Long)
18th47th26th15th120th20th12th113th16th
Collatz
21st46th31st17th242nd31st11th85th10th
Diamonds
28th19th
4th8th31st11th
Divisors
18th61st29th20th346th81st21st806th46th
Evil Numbers
11th34th36th13th53rd6th6th1st10th
Evil Numbers (Long)
11th40th34th12th70th18th12th35th7th
Farey Sequence
15th
9th
Fibonacci
26th
73rd24th296th112th
886th34th
Fizz Buzz
30th58th64th13th1,062nd85th10th1,146th41st
Gijswijt’s Sequence
8th25th5th6th35th5th8th32nd6th
Happy Numbers
11th
29th18th145th27th
14th
Happy Numbers (Long)
10th35th30th12th82nd22nd9th67th9th
Leap Years
12th37th27th8th202nd19th4th169th8th
Niven Numbers
15th43rd37th18th195th33rd1st236th6th
Niven Numbers (Long)
18th46th32nd17th126th18th8th224th8th
Odious Numbers
12th32nd35th13th
6th6th1st11th
Odious Numbers (Long)
11th31st34th12th66th19th12th1st7th
Pascal’s Triangle
13th48th18th12th131st17th7th283rd14th
Pernicious Numbers
30th
29th1st70th18th
Pernicious Numbers (Long)
14th35th14th10th51st12th3rd56th10th
Prime Numbers
16th51st45th17th204th35th18th427th28th
Prime Numbers (Long)
22nd41st28th14th107th23rd8th181st16th
Sierpiński Triangle
4th31st9th4th14th14th4th44th5th