Arithmetic Numbers
3rdAscending Primes
3rdDivisors
1stEmirp Numbers
6thEvil Numbers
1stEvil Numbers (Long)
1stFactorial Factorisation
3rdFibonacci
1stHappy Numbers
4thHappy Numbers (Long)
1stISBN
3rdLook and Say
5thOdious Numbers
1stOdious Numbers (Long)
1stPascalβs Triangle
1stPrime Numbers
1stPrime Numbers (Long)
1st