12 Days of Christmas
413
99 Bottles of Beer
412
Abundant Numbers
576577
Arabic to Roman
Arrows
292
ASCII Table
394
Catalan Numbers
64
Catalan’s Constant
251
Christmas Trees
315
Collatz
597
CSS Colors
134
Day of Week
692
Divisors
541
Emirp Numbers
337466
Emirp Numbers (Long)
402513
Emojify
244
Evil Numbers
486502
Evil Numbers (Long)
492559
Fibonacci
456490538
Fizz Buzz
577
Foo Fizz Buzz Bar
641668583475
Fractions
540454
Happy Numbers
298
Happy Numbers (Long)
424
Hexdump
368
ISBN
440
Kolakoski Constant
233
Kolakoski Sequence
291
Leap Years
660
Levenshtein Distance
665
Leyland Numbers
575
Look and Say
231
Lucky Numbers
365
Morse Decoder
172
Morse Encoder
195
Musical Chords
94
Niven Numbers
689
Niven Numbers (Long)
782
Odious Numbers
552595
Odious Numbers (Long)
565592
Ordinal Numbers
305
Pangram Grep
397
Pascal’s Triangle
362
Pernicious Numbers
276
Poker
256
Prime Numbers
437464
Prime Numbers (Long)
450
Recamán
393
Roman to Arabic
494397
Seven Segment
282
Sierpiński Triangle
140
Smith Numbers
326
Spelling Numbers
298
Time Distance
417
Tongue-twisters
662
United States
145
Van Eck Sequence
213
λ
501
π
180
τ
105
φ
103
√2
127
𝑒
149