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.

A202873 Symmetric matrix based on (1,3,7,15,31,...), by antidiagonals.

Table of values

n a(n)
1 1
2 3
3 3
4 7
5 10
6 7
7 15
8 24
9 24
10 15
11 31
12 52
13 59
14 52
15 31
16 63
17 108
18 129
19 129
20 108
21 63
22 127
23 220
24 269
25 284
26 269
27 220
28 127
29 255
30 444
31 549
32 594
33 594
34 549
35 444
36 255
37 511
38 892
39 1109
40 1214
41 1245
42 1214
43 1109
44 892
45 511
46 1023
47 1788
48 2229
49 2454
50 2547
51 2547
52 2454

List of values

[1, 3, 3, 7, 10, 7, 15, 24, 24, 15, 31, 52, 59, 52, 31, 63, 108, 129, 129, 108, 63, 127, 220, 269, 284, 269, 220, 127, 255, 444, 549, 594, 594, 549, 444, 255, 511, 892, 1109, 1214, 1245, 1214, 1109, 892, 511, 1023, 1788, 2229, 2454, 2547, 2547, 2454]