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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.

A287919 Square array T(0,n) = prime(n) and T(m+1,n) = T(m,n) + T(m,n+1), m >= 0, n >= 1, read by falling antidiagonals.

Table of values

n a(n)
0 2
1 3
2 5
3 5
4 8
5 13
6 7
7 12
8 20
9 33
10 11
11 18
12 30
13 50
14 83
15 13
16 24
17 42
18 72
19 122
20 205
21 17
22 30
23 54
24 96
25 168
26 290
27 495
28 19
29 36
30 66
31 120
32 216
33 384
34 674
35 1169
36 23
37 42
38 78
39 144
40 264
41 480
42 864
43 1538
44 2707
45 29
46 52
47 94
48 172
49 316
50 580
51 1060
52 1924
53 3462
54 6169

List of values

[2, 3, 5, 5, 8, 13, 7, 12, 20, 33, 11, 18, 30, 50, 83, 13, 24, 42, 72, 122, 205, 17, 30, 54, 96, 168, 290, 495, 19, 36, 66, 120, 216, 384, 674, 1169, 23, 42, 78, 144, 264, 480, 864, 1538, 2707, 29, 52, 94, 172, 316, 580, 1060, 1924, 3462, 6169]