12 Days of Christmas
772884
99 Bottles of Beer
Abundant Numbers
785
Christmas Trees
629
Collatz
880
Diamonds
380
Divisors
893
Fibonacci
928
Fizz Buzz
873835
Happy Numbers
502
Intersection
698
Kolakoski Sequence
648
Leap Years
673
Look and Say
649633
Niven Numbers (Long)
797
Ordinal Numbers
673
Pascal’s Triangle
642
Prime Numbers
842
Quine
931
Roman to Arabic
442
Seven Segment
673
Sierpiński Triangle
456
φ
193
√2
211