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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.

A386369 a(1) = 0, and for any n > 1, a(n) is the largest k < n such that a(1) + ... + a(k) is a square number.

Table of values

n a(n)
1 0
2 1
3 2
4 2
5 2
6 2
7 6
8 6
9 6
10 6
11 6
12 6
13 6
14 6
15 6
16 6
17 6
18 6
19 18
20 18
21 18
22 18
23 18
24 18
25 18
26 18
27 26
28 26
29 26
30 26
31 26
32 26
33 26
34 26
35 26
36 26
37 26
38 26
39 26
40 26
41 26
42 26
43 26
44 26
45 26
46 26
47 26
48 26
49 26
50 26
51 26
52 26
53 26
54 26
55 26
56 26
57 26
58 26
59 26
60 26
61 26
62 26
63 26
64 26
65 26
66 26
67 26
68 26
69 26
70 26

List of values

[0, 1, 2, 2, 2, 2, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 6, 18, 18, 18, 18, 18, 18, 18, 18, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26, 26]

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

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