12 Days of Christmas
597
99 Bottles of Beer
411
Abundant Numbers
575576
Arabic to Roman
Arrows
291
ASCII Table
409
Catalan Numbers
72
Catalan’s Constant
251
Christmas Trees
314
Collatz
597
CSS Colors
134
Day of Week
690
Divisors
540
Emirp Numbers
336466
Emirp Numbers (Long)
400511
Emojify
243
Evil Numbers
486501
Evil Numbers (Long)
491558
Fibonacci
456490538
Fizz Buzz
577
Foo Fizz Buzz Bar
639667582474
Fractions
538452
Happy Numbers
298
Happy Numbers (Long)
422
Hexdump
367
ISBN
445
Kolakoski Constant
232
Kolakoski Sequence
290
Leap Years
659
Levenshtein Distance
664
Leyland Numbers
575
Look and Say
230
Lucky Numbers
386
Morse Decoder
171
Morse Encoder
195
Musical Chords
94
Niven Numbers
688
Niven Numbers (Long)
780
Odious Numbers
551595
Odious Numbers (Long)
563590
Ordinal Numbers
305
Pangram Grep
395
Pascal’s Triangle
361
Pernicious Numbers
276
Poker
255
Prime Numbers
437464
Prime Numbers (Long)
449
Recamán
393
Roman to Arabic
493396
Seven Segment
282
Sierpiński Triangle
140
Smith Numbers
324
Spelling Numbers
296
Time Distance
427
Tongue-twisters
664
United States
145
Van Eck Sequence
213
λ
499
π
180
τ
105
φ
103
√2
127
𝑒
149