12 Days of Christmas
618
99 Bottles of Beer
426
Abundant Numbers
578647
Arabic to Roman
Arrows
244
ASCII Table
420
Catalan Numbers
72
Catalan’s Constant
132
Christmas Trees
316
Collatz
601
CSS Colors
236
Day of Week
690
Divisors
540
Emirp Numbers
382526
Emirp Numbers (Long)
400511
Emojify
293
Evil Numbers
486501
Evil Numbers (Long)
491558
Fibonacci
456490538
Fizz Buzz
580
Foo Fizz Buzz Bar
645673589597
Fractions
538452
Happy Numbers
412
Happy Numbers (Long)
425
Hexdump
379
ISBN
448
Kolakoski Constant
124
Kolakoski Sequence
290
Leap Years
660
Levenshtein Distance
664
Leyland Numbers
575
Look and Say
230
Lucky Numbers
386
Morse Decoder
176
Morse Encoder
226
Musical Chords
93
Niven Numbers
693
Niven Numbers (Long)
785
Odious Numbers
551595
Odious Numbers (Long)
563590
Ordinal Numbers
309
Pangram Grep
397
Pascal’s Triangle
361
Pernicious Numbers
276
Poker
268
Prime Numbers
437464
Prime Numbers (Long)
449
Recamán
395
Roman to Arabic
496400
Seven Segment
286
Sierpiński Triangle
138
Smith Numbers
324
Spelling Numbers
296
Time Distance
451
Tongue-twisters
690
United States
148
Van Eck Sequence
213
λ
619
π
113
τ
109
φ
108
√2
111
𝑒
78