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.

A303430 Number of binary words of length n with exactly twice as many occurrences of subword 101 as occurrences of subword 010.

Table of values

n a(n)
0 1
1 2
2 4
3 6
4 10
5 17
6 28
7 49
8 84
9 148
10 263
11 472
12 858
13 1568
14 2893
15 5372
16 10034
17 18824
18 35428
19 66898
20 126683
21 240483
22 457334
23 870956
24 1660850
25 3171112
26 6061596
27 11597587
28 22206775
29 42551339
30 81591256
31 156553245
32 300565760
33 577360360
34 1109601934
35 2133499936

List of values

[1, 2, 4, 6, 10, 17, 28, 49, 84, 148, 263, 472, 858, 1568, 2893, 5372, 10034, 18824, 35428, 66898, 126683, 240483, 457334, 870956, 1660850, 3171112, 6061596, 11597587, 22206775, 42551339, 81591256, 156553245, 300565760, 577360360, 1109601934, 2133499936]

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

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