12 Days of Christmas
81299 Bottles of Beer
604Abundant Numbers
766Christmas Trees
714Diamonds
514Divisors
817Emirp Numbers
446Evil Numbers
521Fibonacci
717Fizz Buzz
1,000Happy Numbers
463Leap Years
603Niven Numbers
764Odious Numbers
567Pascal’s Triangle
366Pernicious Numbers
430Prime Numbers
571Roman to Arabic
420Seven Segment
484Sierpiński Triangle
243λ
171π
55τ
61φ
49√2
51𝑒
50