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.

A255386 Number of binary words of length n with exactly one occurrence of subword 010 and exactly one occurrence of subword 101.

Table of values

n a(n)
0 0
1 0
2 0
3 0
4 2
5 4
6 10
7 20
8 42
9 84
10 166
11 320
12 608
13 1140
14 2116
15 3892
16 7102
17 12868
18 23170
19 41488
20 73918
21 131104
22 231578
23 407520
24 714672
25 1249368
26 2177736
27 3785688
28 6564362
29 11355940
30 19602154
31 33767228
32 58056786
33 99638364
34 170711134
35 292011872
36 498747632

List of values

[0, 0, 0, 0, 2, 4, 10, 20, 42, 84, 166, 320, 608, 1140, 2116, 3892, 7102, 12868, 23170, 41488, 73918, 131104, 231578, 407520, 714672, 1249368, 2177736, 3785688, 6564362, 11355940, 19602154, 33767228, 58056786, 99638364, 170711134, 292011872, 498747632]

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

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