Abundant Numbers
14th41st30th13th213th23rd12th192nd22nd
Abundant Numbers (Long)
16th43rd25th14th107th18th12th104th15th
Collatz
16th43rd30th16th217th30th10th76th9th
Diamonds
25th19th
4th7th30th9th
Divisors
17th58th26th20th337th77th19th760th45th
Evil Numbers
10th30th34th12th51st6th6th1st9th
Evil Numbers (Long)
10th38th32nd11th61st14th10th32nd6th
Farey Sequence
14th
8th
Fibonacci
22nd
67th22nd282nd105th
828th31st
Fizz Buzz
28th54th58th12th1,024th83rd9th1,099th40th
Gijswijt’s Sequence
7th23rd4th4th32nd5th7th29th6th
Happy Numbers
10th
27th17th137th27th
12th
Happy Numbers (Long)
8th33rd27th11th76th22nd9th61st9th
Leap Years
10th34th26th8th189th19th4th153rd8th
Niven Numbers
14th38th33rd17th179th28th1st219th6th
Niven Numbers (Long)
16th42nd30th16th112th17th7th199th7th
Odious Numbers
11th29th33rd12th
6th6th1st9th
Odious Numbers (Long)
10th28th32nd11th58th15th10th1st6th
Pascal’s Triangle
11th45th15th10th121st17th7th259th13th
Pernicious Numbers
27th
25th1st62nd15th
Pernicious Numbers (Long)
11th30th13th9th45th12th3rd47th9th
Prime Numbers
14th46th41st16th191st34th16th396th25th
Prime Numbers (Long)
18th38th26th13th96th22nd7th160th13th
Sierpiński Triangle
2nd27th9th4th13th14th4th41st5th