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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.

A348220 Numerators of coefficients for numerical integration of certain differential systems (Array A(i,k) read by ascending antidiagonals).

Table of values

n a(n)
0 2
1 2
2 0
3 2
4 2
5 1
6 2
7 4
8 1
9 -1
10 2
11 6
12 7
13 0
14 29
15 2
16 8
17 19
18 1
19 -1
20 -14
21 2
22 10
23 37
24 8
25 -1
26 1
27 1139
28 2
29 12
30 61
31 9
32 29
33 0
34 -37
35 -41
36 2
37 14
38 91
39 64
40 269
41 -1
42 1
43 8
44 32377
45 2
46 16
47 127
48 125
49 1079
50 14
51 1
52 -1
53 -119
54 -3956
55 2
56 18
57 169
58 72
59 2999
60 33
61 -37
62 0
63 127
64 9
65 2046263

List of values

[2, 2, 0, 2, 2, 1, 2, 4, 1, -1, 2, 6, 7, 0, 29, 2, 8, 19, 1, -1, -14, 2, 10, 37, 8, -1, 1, 1139, 2, 12, 61, 9, 29, 0, -37, -41, 2, 14, 91, 64, 269, -1, 1, 8, 32377, 2, 16, 127, 125, 1079, 14, 1, -1, -119, -3956, 2, 18, 169, 72, 2999, 33, -37, 0, 127, 9, 2046263]