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.

A249293 Number of length 3+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 48
2 428
3 2144
4 9504
5 29100
6 76856
7 178644
8 374540
9 723300
10 1314744
11 2258528
12 3717444
13 5893024
14 9039940
15 13477788
16 19618656
17 27921268
18 38978528
19 53474096
20 72214004
21 96133160
22 126348344
23 164077052
24 210790324
25 268108160
26 337868944

List of values

[48, 428, 2144, 9504, 29100, 76856, 178644, 374540, 723300, 1314744, 2258528, 3717444, 5893024, 9039940, 13477788, 19618656, 27921268, 38978528, 53474096, 72214004, 96133160, 126348344, 164077052, 210790324, 268108160, 337868944]

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

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