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.

A269649 Number of length-n 0..n arrays with no adjacent pair x,x+1 repeated.

Table of values

n a(n)
1 2
2 9
3 64
4 621
5 7686
6 115902
7 2061940
8 42277329
9 981592964
10 25455321375
11 729233710320
12 22870710513322
13 779384544768952
14 28676004488510379
15 1132947222095403840
16 47837636065465105365
17 2149808857973618974752

List of values

[2, 9, 64, 621, 7686, 115902, 2061940, 42277329, 981592964, 25455321375, 729233710320, 22870710513322, 779384544768952, 28676004488510379, 1132947222095403840, 47837636065465105365, 2149808857973618974752]

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

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