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.

A248464 Number of length 3+2 0..n arrays with no three consecutive terms having the sum of any two elements equal to twice the third.

Table of values

n a(n)
1 16
2 72
3 460
4 1512
5 4272
6 9684
7 20236
8 37868
9 67140
10 111104
11 177024
12 269892
13 400040
14 574140
15 806808
16 1107132
17 1493952
18 1978984
19 2586340
20 3330852
21 4242444
22 5338788
23 6656352
24 8217136
25 10064140
26 12222784
27 14744480
28 17659176
29 21025952
30 24879392

List of values

[16, 72, 460, 1512, 4272, 9684, 20236, 37868, 67140, 111104, 177024, 269892, 400040, 574140, 806808, 1107132, 1493952, 1978984, 2586340, 3330852, 4242444, 5338788, 6656352, 8217136, 10064140, 12222784, 14744480, 17659176, 21025952, 24879392]

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

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