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.

A202670 Symmetric matrix based on A000290 (the squares), by antidiagonals.

Table of values

n a(n)
1 1
2 4
3 4
4 9
5 17
6 9
7 16
8 40
9 40
10 16
11 25
12 73
13 98
14 73
15 25
16 36
17 116
18 184
19 184
20 116
21 36
22 49
23 169
24 298
25 354
26 298
27 169
28 49
29 64
30 232
31 440
32 584
33 584
34 440
35 232
36 64
37 81
38 305
39 610
40 874
41 979
42 874
43 610
44 305
45 81
46 100
47 388
48 808
49 1224
50 1484
51 1484
52 1224
53 808
54 388
55 100
56 121

List of values

[1, 4, 4, 9, 17, 9, 16, 40, 40, 16, 25, 73, 98, 73, 25, 36, 116, 184, 184, 116, 36, 49, 169, 298, 354, 298, 169, 49, 64, 232, 440, 584, 584, 440, 232, 64, 81, 305, 610, 874, 979, 874, 610, 305, 81, 100, 388, 808, 1224, 1484, 1484, 1224, 808, 388, 100, 121]

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

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