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.

A242235 Number of length n+4+1 0..4 arrays with every value 0..4 appearing at least once in every consecutive 4+2 elements, and new values 0..4 introduced in order.

Table of values

n a(n)
1 15
2 35
3 71
4 139
5 271
6 531
7 1047
8 2059
9 4047
10 7955
11 15639
12 30747
13 60447
14 118835
15 233623
16 459291
17 902943
18 1775139
19 3489831
20 6860827
21 13488031
22 26516771
23 52130599
24 102486059
25 201482287
26 396103747
27 778719463
28 1530922155
29 3009713711

List of values

[15, 35, 71, 139, 271, 531, 1047, 2059, 4047, 7955, 15639, 30747, 60447, 118835, 233623, 459291, 902943, 1775139, 3489831, 6860827, 13488031, 26516771, 52130599, 102486059, 201482287, 396103747, 778719463, 1530922155, 3009713711]

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

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