12 Days of Christmas
883
Abundant Numbers
738
Arrows
517
Christmas Trees
717
Collatz
899
Diamonds
561
Divisors
984
Emirp Numbers
569
Evil Numbers
769
Evil Numbers (Long)
753
Fibonacci
605
934
805
Fizz Buzz
929
761
Foo Fizz Buzz Bar
802
Fractions
679
Intersection
789
ISBN
740
Leap Years
706
Look and Say
436
Niven Numbers
746
Niven Numbers (Long)
813
Number Spiral
469
Odious Numbers
783
Odious Numbers (Long)
765
Ordinal Numbers
839
Prime Numbers
577
Quine
946
φ
727
√2
763
𝑒
757