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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.

A235115 Number of independent vertex subsets of the graph obtained by attaching two pendant edges to each vertex of the star graph S_n (having n vertices; see A235114).

Table of values

n a(n)
1 5
2 24
3 116
4 564
5 2756
6 13524
7 66596
8 328884
9 1628036
10 8074644
11 40111076
12 199506804
13 993339716
14 4949921364
15 24682497956
16 123144054324
17 614646529796
18 3068937681684
19 15327508539236
20 76568823219444
21 382569238190276
22 1911746679323604
23 9554335350106916
24 47754084564490164
25 238700054078273156

List of values

[5, 24, 116, 564, 2756, 13524, 66596, 328884, 1628036, 8074644, 40111076, 199506804, 993339716, 4949921364, 24682497956, 123144054324, 614646529796, 3068937681684, 15327508539236, 76568823219444, 382569238190276, 1911746679323604, 9554335350106916, 47754084564490164, 238700054078273156]

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

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