12 Days of Christmas
187
99 Bottles of Beer
710
Abundant Numbers
543
Abundant Numbers (Long)
597
Arabic to Roman
248
Arithmetic Numbers
642
Arrows
398
Ascending Primes
148
ASCII Table
381
Card Number Validation
637
Catalan Numbers
492
Christmas Trees
146
Collatz
656
CSS Colors
205
Day of Week
689
Divisors
694607
Emirp Numbers
464
Evil Numbers
562982
Evil Numbers (Long)
570952
Factorial Factorisation
522
Farey Sequence
543
Fibonacci
829871584935
Fizz Buzz
722685
Foo Fizz Buzz Bar
695
Forsyth–Edwards Notation
267
Fractions
576
Happy Numbers
635
Happy Numbers (Long)
597
ISBN
610
Leap Years
532
Leyland Numbers
606
ln 2
674
Look and Say
614
Niven Numbers
599
Niven Numbers (Long)
599
Odious Numbers
569980
Odious Numbers (Long)
574973
Ordinal Numbers
536
Pascal’s Triangle
358
Pernicious Numbers
335
Pernicious Numbers (Long)
396
Prime Numbers
480
Prime Numbers (Long)
472
Recamán
582
Set
463
Spelling Numbers
445
United States
72
π
348
τ
320