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.

A215976 2-adic valuation of the denominator of sum( k!/2^k, k=1..n ).

Table of values

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

List of values

[1, 0, 2, 2, 0, 2, 3, 3, 3, 3, 2, 0, 3, 0, 4, 4, 4, 4, 4, 4, 4, 4, 3, 3, 0, 3, 4, 4, 0, 4, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 4, 4, 4, 4, 3, 2, 4, 0, 5, 5, 5, 5, 4, 0, 5, 0, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6]