12 Days of Christmas
619
99 Bottles of Beer
425
Abundant Numbers
579627
Arabic to Roman
134
Arrows
239
ASCII Table
405
Catalan Numbers
64
Catalan’s Constant
132
Christmas Trees
317
Collatz
603
CSS Colors
240
Day of Week
693
Divisors
541
Emirp Numbers
382527
Emirp Numbers (Long)
403514
Emojify
287
Evil Numbers
486502
Evil Numbers (Long)
493561
Fibonacci
456491538
Fizz Buzz
580
Foo Fizz Buzz Bar
648673590598
Fractions
541457
Happy Numbers
413
Happy Numbers (Long)
427
Hexdump
380
ISBN
445
Kolakoski Constant
124
Kolakoski Sequence
292
Leap Years
661
Levenshtein Distance
665
Leyland Numbers
578
Look and Say
231
Lucky Numbers
366
Morse Decoder
176
Morse Encoder
227
Musical Chords
94
Niven Numbers
695
Niven Numbers (Long)
788
Odious Numbers
552596
Odious Numbers (Long)
565593
Ordinal Numbers
309
Pangram Grep
400
Pascal’s Triangle
362
Pernicious Numbers
277
Poker
269
Prime Numbers
437464
Prime Numbers (Long)
451
Recamán
396
Roman to Arabic
497403
Seven Segment
287
Sierpiński Triangle
138
Smith Numbers
314
Spelling Numbers
300
Time Distance
441
Tongue-twisters
691
United States
148
Van Eck Sequence
214
λ
623
π
113
τ
109
φ
108
√2
111
𝑒
77