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.

A229009 Number of arrays of median of three adjacent elements of some length n+2 0..5 array, with no adjacent equal elements in the latter.

Table of values

n a(n)
1 6
2 34
3 186
4 794
5 3002
6 10860
7 38768
8 139456
9 506236
10 1849846
11 6780968
12 24874236
13 91221120
14 334365156
15 1225151856
16 4488311694
17 16442040398
18 60232977210
19 220660283800
20 808393136582
21 2961592442222
22 10849984832400
23 39749595896184

List of values

[6, 34, 186, 794, 3002, 10860, 38768, 139456, 506236, 1849846, 6780968, 24874236, 91221120, 334365156, 1225151856, 4488311694, 16442040398, 60232977210, 220660283800, 808393136582, 2961592442222, 10849984832400, 39749595896184]

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

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