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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.

A128444 Array T by antidiagonals: T(n,k)=Floor(k*3^(n/2)).

Table of values

n a(n)
1 1
2 3
3 3
4 5
5 6
6 5
7 6
8 9
9 10
10 9
11 8
12 12
13 15
14 18
15 15
16 10
17 15
18 20
19 27
20 31
21 27
22 12
23 18
24 25
25 36
26 46
27 54
28 46
29 13
30 21
31 31
32 45
33 62
34 81
35 93
36 81
37 15
38 24
39 36
40 54
41 77
42 108
43 140
44 162
45 140
46 17
47 27
48 41
49 63
50 93
51 135
52 187
53 243
54 280
55 243
56 19
57 30
58 46
59 72
60 109
61 162
62 233
63 324
64 420
65 486
66 420
67 20
68 33

List of values

[1, 3, 3, 5, 6, 5, 6, 9, 10, 9, 8, 12, 15, 18, 15, 10, 15, 20, 27, 31, 27, 12, 18, 25, 36, 46, 54, 46, 13, 21, 31, 45, 62, 81, 93, 81, 15, 24, 36, 54, 77, 108, 140, 162, 140, 17, 27, 41, 63, 93, 135, 187, 243, 280, 243, 19, 30, 46, 72, 109, 162, 233, 324, 420, 486, 420, 20, 33]

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

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