12 Days of Christmas
174
99 Bottles of Beer
390
17
Abundant Numbers
291
Christmas Trees
111
Diamonds
60
Divisors
416
Emirp Numbers
459
Evil Numbers
500
Fibonacci
336
Fizz Buzz
288
400
Happy Numbers
521
Leap Years
377
Niven Numbers
333
Odious Numbers
500
Ordinal Numbers
Pascalβs Triangle
69
Pernicious Numbers
250
175
357
Prime Numbers
333
320
Quine
1,000
440
526
854
630
893
492
426
1,000
482
477
783
969
436
893
SierpiΕski Triangle
104
Ξ»
248
172
558
167
534
162
179
Ο
84
59
110
25
94
64
46
Ο
88
61
110
27
94
64
46
Ο
58
49
109
31
92
52
27
β2
55
51
112
27
95
48
32
π
59
49
89
26
65
47
32