Abundant Numbers
44thAbundant Numbers (Long)
31stArithmetic Numbers
18thCatalan Numbers
34thCollatz
32ndDivisors
36thFactorial Factorisation
8thFarey Sequence
12thFibonacci
59thGijswijt’s Sequence
10thHappy Numbers
22ndHappy Numbers (Long)
19thIntersection
12thInventory Sequence
14thISBN
18thKolakoski Sequence
16thLeap Years
44thNiven Numbers
26thNiven Numbers (Long)
18thOdious Numbers
33rdOrdinal Numbers
15thPangram Grep
21stPascal’s Triangle
28thPernicious Numbers
31stPrime Numbers
34thPrime Numbers (Long)
24thRecamán
18thReverse Polish Notation
13thRoman to Arabic
12thRule 110
17th√2
48th