12 Days of Christmas
413
99 Bottles of Beer
412
Abundant Numbers
576578
Arabic to Roman
134
Arrows
289
ASCII Table
395
Catalan Numbers
64
Catalan’s Constant
252
Christmas Trees
315
Collatz
599
CSS Colors
136
Day of Week
693
Divisors
541
Emirp Numbers
337467
Emirp Numbers (Long)
403514
Emojify
244
Evil Numbers
486502
Evil Numbers (Long)
493561
Fibonacci
456491538
Fizz Buzz
577
Foo Fizz Buzz Bar
643669583475
Fractions
541457
Happy Numbers
298
Happy Numbers (Long)
425
Hexdump
369
ISBN
442
Kolakoski Constant
233
Kolakoski Sequence
292
Leap Years
660
Levenshtein Distance
665
Leyland Numbers
577
Look and Say
231
Lucky Numbers
366
Morse Decoder
170
Morse Encoder
195
Musical Chords
95
Niven Numbers
689
Niven Numbers (Long)
783
Odious Numbers
552596
Odious Numbers (Long)
565593
Ordinal Numbers
306
Pangram Grep
399
Pascal’s Triangle
362
Pernicious Numbers
277
Poker
257
Prime Numbers
437464
Prime Numbers (Long)
451
Recamán
394
Roman to Arabic
495399
Seven Segment
283
Sierpiński Triangle
140
Smith Numbers
314
Spelling Numbers
300
Time Distance
419
Tongue-twisters
663
United States
146
Van Eck Sequence
214
λ
502
π
180
τ
106
φ
103
√2
105
𝑒
147