Abundant Numbers
15th41st31st13th218th24th12th203rd23rd
Abundant Numbers (Long)
17th43rd26th14th111th19th12th110th16th
Collatz
18th43rd30th16th229th31st11th80th10th
Diamonds
25th19th
4th7th31st10th
Divisors
18th58th27th20th342nd79th21st783rd47th
Evil Numbers
11th31st35th12th53rd6th6th1st9th
Evil Numbers (Long)
11th38th33rd11th67th16th11th33rd6th
Farey Sequence
15th
8th
Fibonacci
23rd
70th22nd287th107th
858th32nd
Fizz Buzz
29th56th62nd12th1,049th85th10th1,124th41st
Gijswijt’s Sequence
8th24th5th4th32nd5th7th29th6th
Happy Numbers
11th
28th17th141st27th
14th
Happy Numbers (Long)
9th33rd28th11th78th22nd9th65th9th
Leap Years
12th34th26th8th193rd19th4th162nd8th
Niven Numbers
15th41st35th17th186th32nd1st228th6th
Niven Numbers (Long)
17th44th31st16th120th18th8th213th8th
Odious Numbers
12th29th34th12th
6th6th1st9th
Odious Numbers (Long)
11th28th33rd11th63rd17th11th1st6th
Pascal’s Triangle
12th46th15th11th124th17th7th275th13th
Pernicious Numbers
28th
27th1st65th17th
Pernicious Numbers (Long)
13th31st14th9th48th12th3rd53rd9th
Prime Numbers
15th48th43rd16th199th35th17th410th27th
Prime Numbers (Long)
20th38th27th13th104th23rd8th169th15th
Sierpiński Triangle
4th28th9th4th14th14th4th43rd5th