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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.

A213667 Number of dominating subsets with k vertices in all the graphs G(n) (n>=1) obtained by taking n copies of the path P_3 and identifying one of their endpoints (a star with n branches of length 2).

Table of values

n a(n)
1 1
2 6
3 16
4 40
5 98
6 238
7 576
8 1392
9 3362
10 8118
11 19600
12 47320
13 114242
14 275806
15 665856
16 1607520
17 3880898
18 9369318
19 22619536
20 54608392
21 131836322
22 318281038
23 768398400
24 1855077840
25 4478554082
26 10812186006
27 26102926096
28 63018038200
29 152139002498
30 367296043198

List of values

[1, 6, 16, 40, 98, 238, 576, 1392, 3362, 8118, 19600, 47320, 114242, 275806, 665856, 1607520, 3880898, 9369318, 22619536, 54608392, 131836322, 318281038, 768398400, 1855077840, 4478554082, 10812186006, 26102926096, 63018038200, 152139002498, 367296043198]

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

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