12 Days of Christmas
352606
99 Bottles of Beer
Abundant Numbers
687
Christmas Trees
616
Collatz
863
Diamonds
315
Divisors
875
Fibonacci
920
Fizz Buzz
795824
Happy Numbers
387
Intersection
686
Kolakoski Sequence
642
Leap Years
663
Look and Say
524618
Niven Numbers (Long)
771
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