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.

A249706 Number of length n+3 0..7 arrays with every four consecutive terms having the maximum of some two terms equal to the minimum of the remaining two terms.

Table of values

n a(n)
1 904
2 2864
3 8688
4 24032
5 57912
6 156416
7 442144
8 1235840
9 3295784
10 8902160
11 24576568
12 68205968
13 186882480
14 511124496
15 1407327072
16 3893357456
17 10747255576
18 29617387520
19 81753189024
20 226221330256
21 626221254528
22 1732751390816

List of values

[904, 2864, 8688, 24032, 57912, 156416, 442144, 1235840, 3295784, 8902160, 24576568, 68205968, 186882480, 511124496, 1407327072, 3893357456, 10747255576, 29617387520, 81753189024, 226221330256, 626221254528, 1732751390816]

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

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