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.

A273905 Number of symmetric bargraphs having semiperimeter n (n>=2).

Table of values

n a(n)
2 1
3 2
4 3
5 5
6 9
7 15
8 27
9 46
10 83
11 143
12 259
13 450
14 817
15 1429
16 2599
17 4570
18 8323
19 14698
20 26797
21 47491
22 86659
23 154042
24 281287
25 501283
26 915907
27 1635835
28 2990383
29 5351138
30 9786369
31 17541671
32 32092959
33 57610988
34 105435607
35 189521640
36 346950321
37 624389105

List of values

[1, 2, 3, 5, 9, 15, 27, 46, 83, 143, 259, 450, 817, 1429, 2599, 4570, 8323, 14698, 26797, 47491, 86659, 154042, 281287, 501283, 915907, 1635835, 2990383, 5351138, 9786369, 17541671, 32092959, 57610988, 105435607, 189521640, 346950321, 624389105]

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

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