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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.

A277314 Number of nonzero coefficients in Stern polynomial B(n,t).

Table of values

n a(n)
0 0
1 1
2 1
3 2
4 1
5 2
6 2
7 3
8 1
9 3
10 2
11 3
12 2
13 3
14 3
15 4
16 1
17 4
18 3
19 3
20 2
21 3
22 3
23 4
24 2
25 4
26 3
27 4
28 3
29 4
30 4
31 5
32 1
33 5
34 4
35 4
36 3
37 4
38 3
39 4
40 2
41 4
42 3
43 4
44 3
45 4
46 4
47 5
48 2
49 5
50 4
51 4
52 3
53 4
54 4
55 5
56 3
57 5
58 4
59 5
60 4
61 5
62 5
63 6
64 1
65 6
66 5
67 5
68 4
69 5
70 4
71 5
72 3
73 5
74 4
75 4
76 3
77 4
78 4
79 5
80 2
81 5
82 4
83 4
84 3
85 4
86 4
87 5
88 3
89 5
90 4
91 5
92 4
93 5
94 5
95 6
96 2
97 6
98 5
99 5
100 4
101 5
102 4
103 5
104 3
105 5
106 4
107 5
108 4
109 5
110 5
111 6
112 3
113 6
114 5
115 5
116 4
117 5
118 5
119 6
120 4

List of values

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