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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.

A001444 Bending a piece of wire of length n+1 (configurations that can only be brought into coincidence by turning the figure over are counted as different).

Table of values

n a(n)
0 1
1 2
2 6
3 15
4 45
5 126
6 378
7 1107
8 3321
9 9882
10 29646
11 88695
12 266085
13 797526
14 2392578
15 7175547
16 21526641
17 64573362
18 193720086
19 581140575
20 1743421725
21 5230206126
22 15690618378
23 47071677987
24 141215033961
25 423644570442
26 1270933711326
27 3812799539655
28 11438398618965

List of values

[1, 2, 6, 15, 45, 126, 378, 1107, 3321, 9882, 29646, 88695, 266085, 797526, 2392578, 7175547, 21526641, 64573362, 193720086, 581140575, 1743421725, 5230206126, 15690618378, 47071677987, 141215033961, 423644570442, 1270933711326, 3812799539655, 11438398618965]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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