mortimervonchappuis
Abundant Numbers
749
Christmas Trees
535
Diamonds
592
Divisors
876
Emirp Numbers
666
Evil Numbers
801
Fibonacci
911
Fizz Buzz
729
Happy Numbers
809
Leap Years
800
Niven Numbers
710
Odious Numbers
783
Pascal’s Triangle
323
Pernicious Numbers
641
Prime Numbers
769
Sierpiński Triangle
100
φ
51