12 Days of Christmas
357605
99 Bottles of Beer
796
Abundant Numbers
697
Christmas Trees
621
Collatz
869
Diamonds
317
Divisors
890
Fibonacci
926
Fizz Buzz
797829
Happy Numbers
389
Intersection
692
Kolakoski Sequence
641
Leap Years
754
Look and Say
527626
Niven Numbers (Long)
787
Ordinal Numbers
661
Pascal’s Triangle
637
Prime Numbers
659
Quine
928
Roman to Arabic
436
Seven Segment
635
Sierpiński Triangle
399
φ
197
√2
222