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.

A269612 Number of length-n 0..n arrays with no repeated value differing from the previous repeated value by other than plus two, zero or minus 1.

Table of values

n a(n)
1 2
2 9
3 64
4 612
5 7440
6 110099
7 1923796
8 38800210
9 887591878
10 22714070251
11 643030722208
12 19954247152834
13 673552866591198
14 24570545121277999
15 963253518328620796
16 40387590591059009524
17 1803427358679591518028

List of values

[2, 9, 64, 612, 7440, 110099, 1923796, 38800210, 887591878, 22714070251, 643030722208, 19954247152834, 673552866591198, 24570545121277999, 963253518328620796, 40387590591059009524, 1803427358679591518028]

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

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