12 Days of Christmas
347586
99 Bottles of Beer
Abundant Numbers
688
Christmas Trees
587
Collatz
864
Diamonds
315
Divisors
876
Fibonacci
920
Fizz Buzz
795824
Happy Numbers
387
Intersection
686
Kolakoski Sequence
643
Leap Years
663
Look and Say
524620
Niven Numbers (Long)
772
Ordinal Numbers
643
Pascal’s Triangle
635
Prime Numbers
657
Quine
927
Roman to Arabic
431
Seven Segment
634
Sierpiński Triangle
436
φ
191
√2
209