Abundant Numbers
19th50th39th16th244th29th14th233rd26th
Abundant Numbers (Long)
20th59th33rd17th136th23rd14th136th19th
Collatz
23rd49th41st17th265th19th12th94th12th
Diamonds
32nd23rd
4th8th42nd13th
Divisors
19th65th34th21st364th87th22nd850th50th
Evil Numbers
12th37th44th13th59th6th6th1st11th
Evil Numbers (Long)
12th42nd39th12th82nd22nd12th47th8th
Farey Sequence
15th
10th
Fibonacci
30th
89th26th324th131st
958th37th
Fizz Buzz
32nd63rd70th14th1,104th88th12th1,222nd41st
Gijswijt’s Sequence
9th27th8th7th44th7th8th45th7th
Happy Numbers
13th
33rd19th153rd29th
15th
Happy Numbers (Long)
12th36th34th12th92nd23rd10th79th10th
Leap Years
13th38th37th10th230th26th5th190th9th
Niven Numbers
15th46th45th20th207th35th1st261st6th
Niven Numbers (Long)
19th47th38th17th141st18th8th252nd8th
Odious Numbers
14th34th42nd13th
6th6th1st13th
Odious Numbers (Long)
12th33rd40th12th78th23rd12th1st7th
Pascal’s Triangle
14th53rd23rd12th143rd15th9th309th15th
Pernicious Numbers
39th
32nd1st84th24th
Pernicious Numbers (Long)
15th35th19th11th57th14th3rd75th12th
Prime Numbers
17th57th51st18th219th40th21st458th32nd
Prime Numbers (Long)
22nd45th31st15th120th27th10th203rd18th
Sierpiński Triangle
6th31st11th5th16th15th4th56th5th