12 Days of Christmas
352605
99 Bottles of Beer
Abundant Numbers
686
Christmas Trees
616
Collatz
863
Diamonds
315
Divisors
875
Fibonacci
920
Fizz Buzz
796825
Happy Numbers
387
Intersection
686
Kolakoski Sequence
647
Leap Years
663
Look and Say
524617
Niven Numbers (Long)
771
Ordinal Numbers
647
Pascal’s Triangle
634
Prime Numbers
657
Quine
927
Roman to Arabic
431
Seven Segment
632
Sierpiński Triangle
437
φ
191
√2
209