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.

A023405 If any power of 2 ends with k 4's and 9's, they must be the first k terms of this sequence in reverse order.

Table of values

n a(n)
1 4
2 4
3 9
4 4
5 9
6 9
7 4
8 9
9 4
10 9
11 4
12 4
13 9
14 9
15 4
16 9
17 4
18 9
19 9
20 9
21 4
22 4
23 4
24 4
25 9
26 4
27 4
28 4
29 4
30 9
31 9
32 9
33 9
34 4
35 9
36 4
37 4
38 9
39 9
40 4
41 4
42 9
43 9
44 4
45 9
46 4
47 4
48 9
49 4
50 9
51 4
52 9
53 4
54 4
55 4
56 4
57 4
58 4
59 9
60 9
61 9
62 9
63 4
64 9
65 4
66 4
67 4
68 9
69 9
70 4
71 4
72 9
73 4
74 4
75 9
76 9
77 4
78 4
79 9
80 9
81 9
82 4
83 9
84 9
85 9
86 9
87 9
88 9
89 4
90 4
91 9
92 4
93 4
94 9
95 9
96 9
97 9
98 9
99 9
100 4
101 4
102 4
103 9
104 9
105 4
106 4
107 4
108 4

List of values

[4, 4, 9, 4, 9, 9, 4, 9, 4, 9, 4, 4, 9, 9, 4, 9, 4, 9, 9, 9, 4, 4, 4, 4, 9, 4, 4, 4, 4, 9, 9, 9, 9, 4, 9, 4, 4, 9, 9, 4, 4, 9, 9, 4, 9, 4, 4, 9, 4, 9, 4, 9, 4, 4, 4, 4, 4, 4, 9, 9, 9, 9, 4, 9, 4, 4, 4, 9, 9, 4, 4, 9, 4, 4, 9, 9, 4, 4, 9, 9, 9, 4, 9, 9, 9, 9, 9, 9, 4, 4, 9, 4, 4, 9, 9, 9, 9, 9, 9, 4, 4, 4, 9, 9, 4, 4, 4, 4]