12 Days of Christmas
405
99 Bottles of Beer
395
Abundant Numbers
690
Abundant Numbers (Long)
797
Arithmetic Numbers
633
Arrows
224
Christmas Trees
563
Collatz
781
Divisors
525947
Emirp Numbers
505
Emirp Numbers (Long)
589
Emojify
272
Evil Numbers
889
Evil Numbers (Long)
872
Factorial Factorisation
78
Farey Sequence
586
Fibonacci
947
Fizz Buzz
873735898
Foo Fizz Buzz Bar
335
795
Forsyth–Edwards Notation
556
Fractions
579
Happy Numbers
500
Happy Numbers (Long)
635
ISBN
592
Leap Years
827
Look and Say
397
Morse Encoder
176
Niven Numbers
772
Niven Numbers (Long)
847
Number Spiral
208
Odious Numbers
851
Ordinal Numbers
569
Pangram Grep
792
Pascal’s Triangle
794
Pernicious Numbers
816
Prime Numbers
952
Prime Numbers (Long)
721
Quine
969
Recamán
671
Seven Segment
321
Smith Numbers
415
Time Distance
377
Tongue-twisters
276
United States
222
π
301
φ
598
√2
1,000
𝑒
1,000