12 Days of Christmas
746832
99 Bottles of Beer
Abundant Numbers
768
Christmas Trees
587
Collatz
864
Diamonds
376
Divisors
876
Fibonacci
920
Fizz Buzz
870824
Happy Numbers
499
Intersection
686
Kolakoski Sequence
643
Leap Years
665
Look and Say
645620
Niven Numbers (Long)
772
Ordinal Numbers
644
Pascal’s Triangle
635
Prime Numbers
838
Quine
927
Roman to Arabic
434
Seven Segment
661
Sierpiński Triangle
444
φ
191
√2
209