Abundant Numbers
15th41st31st13th222nd24th12th205th23rd
Abundant Numbers (Long)
17th43rd26th14th116th19th12th111th16th
Collatz
18th43rd30th16th234th31st11th80th10th
Diamonds
26th19th
4th7th31st10th
Divisors
18th58th27th20th343rd79th21st785th47th
Evil Numbers
11th31st36th12th53rd6th6th1st10th
Evil Numbers (Long)
11th38th34th11th68th17th12th33rd7th
Farey Sequence
15th
8th
Fibonacci
24th
71st22nd291st108th
866th32nd
Fizz Buzz
29th56th62nd12th1,052nd85th10th1,129th41st
Gijswijt’s Sequence
8th24th5th5th33rd5th8th29th6th
Happy Numbers
11th
29th17th142nd27th
14th
Happy Numbers (Long)
10th33rd29th11th80th22nd9th66th9th
Leap Years
12th34th27th8th195th19th4th162nd8th
Niven Numbers
15th42nd35th17th191st32nd1st230th6th
Niven Numbers (Long)
17th44th31st16th122nd18th8th216th8th
Odious Numbers
12th29th35th12th
6th6th1st10th
Odious Numbers (Long)
11th28th34th11th64th18th12th1st7th
Pascal’s Triangle
12th46th16th11th126th17th7th275th13th
Pernicious Numbers
29th
27th1st65th17th
Pernicious Numbers (Long)
13th31st14th9th49th12th3rd54th9th
Prime Numbers
15th48th43rd16th200th35th18th414th27th
Prime Numbers (Long)
20th38th27th13th105th23rd8th172nd15th
Sierpiński Triangle
4th28th9th4th14th14th4th43rd5th