12 Days of Christmas
413
99 Bottles of Beer
411
Abundant Numbers
576577
Arabic to Roman
Arrows
292
ASCII Table
410
Catalan Numbers
64
Catalan’s Constant
251
Christmas Trees
314
Collatz
597
CSS Colors
134
Day of Week
691
Divisors
541
Emirp Numbers
337466
Emirp Numbers (Long)
401512
Emojify
244
Evil Numbers
486502
Evil Numbers (Long)
492559
Fibonacci
456490538
Fizz Buzz
577
Foo Fizz Buzz Bar
640668582475
Fractions
540454
Happy Numbers
298
Happy Numbers (Long)
423
Hexdump
368
ISBN
440
Kolakoski Constant
232
Kolakoski Sequence
291
Leap Years
660
Levenshtein Distance
664
Leyland Numbers
575
Look and Say
230
Lucky Numbers
376
Morse Decoder
172
Morse Encoder
195
Musical Chords
94
Niven Numbers
688
Niven Numbers (Long)
781
Odious Numbers
552595
Odious Numbers (Long)
564591
Ordinal Numbers
305
Pangram Grep
397
Pascal’s Triangle
361
Pernicious Numbers
276
Poker
256
Prime Numbers
437464
Prime Numbers (Long)
450
Recamán
393
Roman to Arabic
494396
Seven Segment
282
Sierpiński Triangle
140
Smith Numbers
325
Spelling Numbers
298
Time Distance
417
Tongue-twisters
662
United States
145
Van Eck Sequence
213
λ
500
π
180
τ
105
φ
103
√2
127
𝑒
149