Abundant Numbers
12th
Abundant Numbers (Long)
12th
Arithmetic Numbers
65th
Ascending Primes
29th
Collatz
1,331st
Divisors
19th
Emirp Numbers
28th
Emirp Numbers (Long)
1st
Evil Numbers
1st
Evil Numbers (Long)
1st
Factorial Factorisation
35th
Farey Sequence
390th
Fibonacci
1st
Happy Numbers
1st
Happy Numbers (Long)
1st
Inventory Sequence
762nd
ISBN
9th
Leap Years
1,822nd
Look and Say
3rd
Lucky Numbers
336th
Niven Numbers
1st
Niven Numbers (Long)
1st
Odious Numbers
1st
Odious Numbers (Long)
1st
Ordinal Numbers
384th
Pascal’s Triangle
1st
Pernicious Numbers
23rd
Pernicious Numbers (Long)
89th
Prime Numbers
1st
Prime Numbers (Long)
1st
Quine
457th