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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.

A049874 a(n)=b(n)-b(n-1), where b=A049862 (differences of products of Fibonacci numbers.)

Table of values

n a(n)
1 1
2 1
3 1
4 2
5 1
6 2
7 2
8 3
9 2
10 1
11 5
12 3
13 2
14 8
15 5
16 1
17 2
18 13
19 8
20 2
21 3
22 21
23 13
24 2
25 1
26 5
27 34
28 21
29 3
30 2
31 8
32 55
33 34
34 5
35 1
36 2
37 13
38 89
39 55
40 8
41 2
42 3
43 21
44 144
45 89
46 13
47 2
48 1
49 5
50 34
51 233
52 144
53 21
54 3
55 2
56 8
57 55
58 377
59 233
60 34
61 5
62 1
63 2
64 13
65 89
66 610
67 377
68 55
69 8
70 2
71 3
72 21
73 144
74 987
75 610
76 89
77 13
78 2
79 1

List of values

[1, 1, 1, 2, 1, 2, 2, 3, 2, 1, 5, 3, 2, 8, 5, 1, 2, 13, 8, 2, 3, 21, 13, 2, 1, 5, 34, 21, 3, 2, 8, 55, 34, 5, 1, 2, 13, 89, 55, 8, 2, 3, 21, 144, 89, 13, 2, 1, 5, 34, 233, 144, 21, 3, 2, 8, 55, 377, 233, 34, 5, 1, 2, 13, 89, 610, 377, 55, 8, 2, 3, 21, 144, 987, 610, 89, 13, 2, 1]

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