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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.

A291741 p-INVERT of (1,0,1,0,0,0,0,...), where p(S) = (1 - S)(1 + S^2).

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 1
5 4
6 5
7 7
8 11
9 12
10 19
11 30
12 42
13 68
14 98
15 137
16 205
17 292
18 429
19 644
20 936
21 1380
22 2024
23 2936
24 4316
25 6324
26 9260
27 13625
28 19949
29 29216
30 42841
31 62701
32 91917
33 134784
34 197485
35 289547
36 424331
37 621708
38 911255
39 1335378
40 1957086
41 2868620
42 4203998
43 6161329

List of values

[1, 0, 1, 1, 1, 4, 5, 7, 11, 12, 19, 30, 42, 68, 98, 137, 205, 292, 429, 644, 936, 1380, 2024, 2936, 4316, 6324, 9260, 13625, 19949, 29216, 42841, 62701, 91917, 134784, 197485, 289547, 424331, 621708, 911255, 1335378, 1957086, 2868620, 4203998, 6161329]