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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.

A094005 a(n) = sum of lengths of strings that can be generated by any starting string of n 2's and 3's, using the rule described in the Comments lines.

Table of values

n a(n)
1 2
2 11
3 30
4 82
5 199
6 480
7 1097
8 2630
9 5828
10 12830
11 27873
12 60071
13 128355
14 273543
15 580149
16 1226626
17 2584822
18 5433676
19 11392986
20 23838396
21 49776503
22 103755527
23 215904926
24 448602871
25 930771041
26 1928682932
27 3991605129
28 8251710234
29 17040335019
30 35154540729
31 72456654860
32 149208536983

List of values

[2, 11, 30, 82, 199, 480, 1097, 2630, 5828, 12830, 27873, 60071, 128355, 273543, 580149, 1226626, 2584822, 5433676, 11392986, 23838396, 49776503, 103755527, 215904926, 448602871, 930771041, 1928682932, 3991605129, 8251710234, 17040335019, 35154540729, 72456654860, 149208536983]

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

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