cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

A248696 Decimal expansion of sum_{n >= 1} (2n)!/(1!*2!*...*n!).

Table of values

n a(n)
3 3
4 3
5 8
6 9
7 4
8 9
9 2
10 8
11 0
12 1
13 0
14 9
15 8
16 9
17 4
18 2
19 4
20 2
21 9
22 7
23 4
24 5
25 0
26 7
27 2
28 3
29 5
30 0
31 4
32 8
33 8
34 6
35 9
36 7
37 6
38 8
39 1
40 1
41 2
42 5
43 5
44 2
45 3
46 0
47 4
48 2
49 5
50 0
51 6
52 4
53 7
54 4
55 4
56 9
57 1
58 6
59 1
60 2
61 4
62 9
63 3
64 0
65 2
66 1
67 2
68 6
69 1
70 4
71 5
72 1
73 3
74 6
75 7
76 4
77 4
78 4
79 0
80 0
81 5
82 4
83 9
84 7
85 7
86 4
87 2
88 9
89 2
90 3
91 6
92 5
93 3
94 3
95 6
96 3
97 3
98 7
99 0
100 9
101 6
102 5
103 6
104 5
105 7

List of values

[3, 3, 8, 9, 4, 9, 2, 8, 0, 1, 0, 9, 8, 9, 4, 2, 4, 2, 9, 7, 4, 5, 0, 7, 2, 3, 5, 0, 4, 8, 8, 6, 9, 7, 6, 8, 1, 1, 2, 5, 5, 2, 3, 0, 4, 2, 5, 0, 6, 4, 7, 4, 4, 9, 1, 6, 1, 2, 4, 9, 3, 0, 2, 1, 2, 6, 1, 4, 5, 1, 3, 6, 7, 4, 4, 4, 0, 0, 5, 4, 9, 7, 7, 4, 2, 9, 2, 3, 6, 5, 3, 3, 6, 3, 3, 7, 0, 9, 6, 5, 6, 5, 7]