12 Days of Christmas
174
99 Bottles of Beer
24
609
Abundant Numbers
559
Arabic to Roman
444
Christmas Trees
687
Collatz
680
Cubes
481
Diamonds
554
Divisors
713
Emirp Numbers
562
Fibonacci
456
Fizz Buzz
509
Foo Fizz Buzz Bar
619
Fractions
469
Happy Numbers
395
Happy Numbers (Long)
456
Kolakoski Sequence
650
Leap Years
705
Leyland Numbers
646
Look and Say
643
Ordinal Numbers
519
Pascal’s Triangle
524
Recamán
634