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.

A069423 Number of n X 3 binary arrays with a path of adjacent 1's and no path of adjacent 0's from top row to bottom row.

Table of values

n a(n)
1 1
2 19
3 147
4 907
5 5149
6 28159
7 151331
8 806463
9 4280141
10 22670199
11 119955523
12 634412111
13 3354416225
14 17734138519
15 93751306327
16 495600489243
17 2619870168133
18 13849199313235
19 73209594712831
20 386999645945759
21 2045750897807901
22 10814208630415211
23 57165847109895879

List of values

[1, 19, 147, 907, 5149, 28159, 151331, 806463, 4280141, 22670199, 119955523, 634412111, 3354416225, 17734138519, 93751306327, 495600489243, 2619870168133, 13849199313235, 73209594712831, 386999645945759, 2045750897807901, 10814208630415211, 57165847109895879]

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

Content is available under The OEIS End-User License Agreement.