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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.

A208902 The sum over all bitstrings b of length n of the number of runs in b not immediately followed by a longer run.

Table of values

n a(n)
1 2
2 6
3 14
4 34
5 78
6 182
7 414
8 942
9 2110
10 4702
11 10366
12 22718
13 49406
14 106878
15 229886
16 492286
17 1049598
18 2229758
19 4720638
20 9964542
21 20975614
22 44046334
23 92282878
24 192950270
25 402669566
26 838885374
27 1744863230
28 3623927806
29 7516258302
30 15569354750
31 32212385790

List of values

[2, 6, 14, 34, 78, 182, 414, 942, 2110, 4702, 10366, 22718, 49406, 106878, 229886, 492286, 1049598, 2229758, 4720638, 9964542, 20975614, 44046334, 92282878, 192950270, 402669566, 838885374, 1744863230, 3623927806, 7516258302, 15569354750, 32212385790]

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

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