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.

A249292 Number of length 2+3 0..n 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 26
2 168
3 660
4 2228
5 5646
6 12600
7 25280
8 46608
9 80334
10 131672
11 206112
12 311352
13 455954
14 649920
15 904884
16 1235024
17 1654734
18 2181960
19 2836016
20 3638460
21 4613010
22 5786924
23 7188012
24 8848968
25 10803998
26 13090368
27 15748356
28 18822884
29 22359246

List of values

[26, 168, 660, 2228, 5646, 12600, 25280, 46608, 80334, 131672, 206112, 311352, 455954, 649920, 904884, 1235024, 1654734, 2181960, 2836016, 3638460, 4613010, 5786924, 7188012, 8848968, 10803998, 13090368, 15748356, 18822884, 22359246]

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

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