12 Days of Christmas
414
99 Bottles of Beer
412
Abundant Numbers
572569
Arabic to Roman
133
Arrows
284
ASCII Table
394
Catalan Numbers
63
Catalan’s Constant
252
Christmas Trees
311
Collatz
592
CSS Colors
136
Day of Week
691
Divisors
531
Emirp Numbers
334461
Emirp Numbers (Long)
398502
Emojify
238
Evil Numbers
485499
Evil Numbers (Long)
489559
Fibonacci
454487537
Fizz Buzz
574
Foo Fizz Buzz Bar
639665578473
Fractions
540454
Happy Numbers
294
Happy Numbers (Long)
417
Hexdump
368
ISBN
433
Kolakoski Constant
231
Kolakoski Sequence
289
Leap Years
641
Levenshtein Distance
650
Leyland Numbers
563
Look and Say
227
Lucky Numbers
355
Morse Decoder
168
Morse Encoder
192
Musical Chords
93
Niven Numbers
677
Niven Numbers (Long)
763
Odious Numbers
549589
Odious Numbers (Long)
560583
Ordinal Numbers
303
Pangram Grep
389
Pascal’s Triangle
357
Pernicious Numbers
272
Poker
257
Prime Numbers
436463
Prime Numbers (Long)
447
Recamán
383
Roman to Arabic
490394
Seven Segment
273
Sierpiński Triangle
135
Smith Numbers
311
Spelling Numbers
296
Time Distance
419
Tongue-twisters
663
United States
145
Van Eck Sequence
210
λ
501
π
179
τ
105
φ
102
√2
104
𝑒
145