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.

A243517 Number of length n+2 0..8 arrays with no three elements in a row with pattern aba or abb (with a!=b) and new values 0..8 introduced in 0..8 order.

Table of values

n a(n)
1 3
2 5
3 10
4 25
5 77
6 280
7 1157
8 5296
9 26406
10 141585
11 807064
12 4837587
13 30181075
14 194210670
15 1279159631
16 8571132698
17 58153599684
18 398124806735
19 2743173705258
20 18987825983429
21 131858977691833
22 917797527716980
23 6398758306106345

List of values

[3, 5, 10, 25, 77, 280, 1157, 5296, 26406, 141585, 807064, 4837587, 30181075, 194210670, 1279159631, 8571132698, 58153599684, 398124806735, 2743173705258, 18987825983429, 131858977691833, 917797527716980, 6398758306106345]

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

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