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.

A202963 Number of arrays of 3 integers in -n..n with sum zero and adjacent elements differing in absolute value.

Table of values

n a(n)
1 2
2 6
3 20
4 36
5 62
6 90
7 128
8 168
9 218
10 270
11 332
12 396
13 470
14 546
15 632
16 720
17 818
18 918
19 1028
20 1140
21 1262
22 1386
23 1520
24 1656
25 1802
26 1950
27 2108
28 2268
29 2438
30 2610
31 2792
32 2976
33 3170
34 3366
35 3572
36 3780
37 3998
38 4218
39 4448
40 4680
41 4922
42 5166
43 5420
44 5676
45 5942
46 6210
47 6488

List of values

[2, 6, 20, 36, 62, 90, 128, 168, 218, 270, 332, 396, 470, 546, 632, 720, 818, 918, 1028, 1140, 1262, 1386, 1520, 1656, 1802, 1950, 2108, 2268, 2438, 2610, 2792, 2976, 3170, 3366, 3572, 3780, 3998, 4218, 4448, 4680, 4922, 5166, 5420, 5676, 5942, 6210, 6488]

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

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