Abundant Numbers
19th47th33rd15th238th26th14th223rd24th
Abundant Numbers (Long)
20th60th28th16th129th21st14th129th17th
Collatz
22nd47th34th17th251st16th11th89th11th
Diamonds
31st21st
4th8th34th11th
Divisors
19th64th31st21st352nd80th22nd832nd49th
Evil Numbers
11th35th39th13th54th6th6th1st10th
Evil Numbers (Long)
11th41st35th12th73rd20th12th41st7th
Farey Sequence
15th
10th
Fibonacci
30th
77th26th307th121st
918th35th
Fizz Buzz
30th62nd65th14th1,077th86th10th1,181st41st
Gijswijt’s Sequence
9th28th5th6th37th6th8th37th6th
Happy Numbers
13th
29th18th149th27th
14th
Happy Numbers (Long)
12th37th31st12th87th21st9th73rd9th
Leap Years
13th38th28th10th209th22nd5th181st8th
Niven Numbers
15th45th40th19th199th30th1st255th6th
Niven Numbers (Long)
20th48th33rd17th131st18th8th236th8th
Odious Numbers
13th33rd37th13th
6th6th1st11th
Odious Numbers (Long)
11th32nd35th12th68th21st12th1st7th
Pascal’s Triangle
14th52nd20th12th137th14th8th297th14th
Pernicious Numbers
34th
27th1st76th19th
Pernicious Numbers (Long)
15th36th16th11th53rd12th3rd69th11th
Prime Numbers
18th55th47th18th211th37th20th445th29th
Prime Numbers (Long)
22nd44th29th15th112th24th9th194th16th
Sierpiński Triangle
5th32nd9th4th14th14th4th50th5th