12 Days of Christmas
359
640
99 Bottles of Beer
857
Abundant Numbers
746
Christmas Trees
678
Collatz
944
Diamonds
324
Divisors
955
Fibonacci
978
Fizz Buzz
803
859
Happy Numbers
397
Intersection
791
Kolakoski Sequence
726
Leap Years
796
Look and Say
541
697
Niven Numbers (Long)
859
Ordinal Numbers
741
Pascal’s Triangle
709
Prime Numbers
709
Quine
1,000
Roman to Arabic
487
Seven Segment
719
Sierpiński Triangle
428
φ
221
√2
247