Abundant Numbers
19th49th39th16th244th29th14th841st26th
Abundant Numbers (Long)
20th58th33rd17th136th23rd14th449th19th
Collatz
23rd48th41st17th265th19th12th440th12th
Diamonds
25th23rd
4th8th71st13th
Divisors
19th65th34th21st364th87th22nd1,278th50th
Evil Numbers
12th37th44th13th59th6th1st1st11th
Evil Numbers (Long)
12th41st39th12th82nd22nd12th47th8th
Farey Sequence
15th
9th
Fibonacci
30th
89th26th324th131st
958th37th
Fizz Buzz
32nd63rd70th14th1,104th88th12th1,578th41st
Gijswijt’s Sequence
9th26th8th7th40th7th8th88th7th
Happy Numbers
13th
32nd19th151st29th
14th
Happy Numbers (Long)
12th35th34th12th91st23rd10th242nd10th
Leap Years
13th42nd37th10th230th26th5th189th9th
Niven Numbers
15th46th45th20th207th35th1st261st1st
Niven Numbers (Long)
19th46th38th17th141st18th8th397th8th
Odious Numbers
14th34th42nd13th
6th1st1st12th
Odious Numbers (Long)
12th33rd40th12th78th23rd12th1st7th
Pascal’s Triangle
14th52nd23rd12th143rd15th9th506th15th
Pernicious Numbers
39th
32nd1st84th24th
Pernicious Numbers (Long)
15th33rd19th11th57th14th3rd103rd12th
Prime Numbers
17th57th51st18th219th40th21st579th32nd
Prime Numbers (Long)
22nd45th31st15th120th27th10th205th18th
Sierpiński Triangle
5th25th11th5th16th15th4th87th5th