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
644
Catalan Numbers
493
Christmas Trees
146
Collatz
654
CSS Colors
108
Day of Week
693
Divisors
713607
Emirp Numbers
334
Evil Numbers
553982
Evil Numbers (Long)
568953
Factorial Factorisation
522
Farey Sequence
545
Fibonacci
812873964935
Fizz Buzz
713965
Foo Fizz Buzz Bar
691
Forsyth–Edwards Notation
269
Fractions
577
Happy Numbers
544
Happy Numbers (Long)
591
ISBN
609
Leap Years
764
Leyland Numbers
785
ln 2
911
Look and Say
616
Niven Numbers
588
Niven Numbers (Long)
569
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
467
Spelling Numbers
403
United States
68
π
324
τ
311