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.

A204004 Symmetric matrix based on f(i,j) = max{2i+j-2,i+2j-2}, by antidiagonals.

Table of values

n a(n)
1 1
2 3
3 3
4 5
5 4
6 5
7 7
8 6
9 6
10 7
11 9
12 8
13 7
14 8
15 9
16 11
17 10
18 9
19 9
20 10
21 11
22 13
23 12
24 11
25 10
26 11
27 12
28 13
29 15
30 14
31 13
32 12
33 12
34 13
35 14
36 15
37 17
38 16
39 15
40 14
41 13
42 14
43 15
44 16
45 17
46 19
47 18
48 17
49 16
50 15
51 15
52 16
53 17
54 18
55 19
56 21
57 20
58 19
59 18
60 17
61 16
62 17
63 18
64 19
65 20
66 21
67 23
68 22
69 21
70 20
71 19
72 18

List of values

[1, 3, 3, 5, 4, 5, 7, 6, 6, 7, 9, 8, 7, 8, 9, 11, 10, 9, 9, 10, 11, 13, 12, 11, 10, 11, 12, 13, 15, 14, 13, 12, 12, 13, 14, 15, 17, 16, 15, 14, 13, 14, 15, 16, 17, 19, 18, 17, 16, 15, 15, 16, 17, 18, 19, 21, 20, 19, 18, 17, 16, 17, 18, 19, 20, 21, 23, 22, 21, 20, 19, 18]