12 Days of Christmas
127
99 Bottles of Beer
694
Abundant Numbers
535
Abundant Numbers (Long)
582
Arabic to Roman
248
Arithmetic Numbers
638
Arrows
516
Ascending Primes
149
ASCII Table
410
Card Number Validation
643
Catalan Numbers
493
Christmas Trees
145
Collatz
654
CSS Colors
108
Day of Week
693
Divisors
712607
Emirp Numbers
334
Evil Numbers
553982
Evil Numbers (Long)
568952
Factorial Factorisation
522
Farey Sequence
545
Fibonacci
812872964935
Fizz Buzz
713965
Foo Fizz Buzz Bar
691
Forsyth–Edwards Notation
269
Fractions
577
Happy Numbers
543
Happy Numbers (Long)
591
ISBN
609
Leap Years
763
Leyland Numbers
785
ln 2
910
Look and Say
616
Niven Numbers
588
Niven Numbers (Long)
568
Odious Numbers
911980
Odious Numbers (Long)
576973
Ordinal Numbers
534
Pascal’s Triangle
359
Pernicious Numbers
335
Pernicious Numbers (Long)
391
Prime Numbers
453
Prime Numbers (Long)
473
Recamán
582
Set
466
Spelling Numbers
403
United States
68
π
343
τ
315