12 Days of Christmas
79
99 Bottles of Beer
281
10
Abundant Numbers
274
Christmas Trees
95
Diamonds
49
Divisors
379
Emirp Numbers
364
Evil Numbers
490
Fibonacci
331
Fizz Buzz
271
362
Happy Numbers
394
Leap Years
371
Niven Numbers
325
Odious Numbers
488
Ordinal Numbers
Pascal’s Triangle
62
Pernicious Numbers
231
165
348
Prime Numbers
316314
Quine
962412479402806898864462945445455735945413854
Sierpiński Triangle
130
λ
227
117
201
1252069780
π
78
57
111
24745637
τ
80
59
108
26725637
φ
52
47
106
29715024
√2
50
49
108
25714727
𝑒
54
47
86
25604627