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.

A243599 Number of length n+2 0..n arrays with no three elements in a row with pattern aba (with a!=b) and new values 0..n introduced in 0..n order.

Table of values

n a(n)
1 3
2 9
3 28
4 96
5 365
6 1533
7 7049
8 35166
9 188834
10 1084179
11 6618471
12 42756207
13 291120550
14 2081922514
15 15590248867
16 121920095673
17 993343650911
18 8414029179364
19 73953763887276
20 673316834487161
21 6340176007793059
22 61657373569634585

List of values

[3, 9, 28, 96, 365, 1533, 7049, 35166, 188834, 1084179, 6618471, 42756207, 291120550, 2081922514, 15590248867, 121920095673, 993343650911, 8414029179364, 73953763887276, 673316834487161, 6340176007793059, 61657373569634585]

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

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