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.

A249285 Number of length n+3 0..3 arrays with no four consecutive terms having the sum of any three elements equal to three times the fourth.

Table of values

n a(n)
1 204
2 660
3 2144
4 6960
5 22572
6 73204
7 237480
8 770416
9 2499164
10 8107012
11 26298608
12 85311248
13 276744204
14 897739412
15 2912207432
16 9447011744
17 30645489228
18 99411957620
19 322485877472
20 1046123080816
21 3393554802188
22 11008469603188

List of values

[204, 660, 2144, 6960, 22572, 73204, 237480, 770416, 2499164, 8107012, 26298608, 85311248, 276744204, 897739412, 2912207432, 9447011744, 30645489228, 99411957620, 322485877472, 1046123080816, 3393554802188, 11008469603188]

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

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