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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.

A343863 Square array T(n,k), n >= 0, k >= 0, read by antidiagonals, where T(n,k) = (n!)^k * Sum_{j=1..n} (1/j!)^k.

Table of values

n a(n)
0 1
1 1
2 2
3 1
4 2
5 3
6 1
7 2
8 5
9 4
10 1
11 2
12 9
13 16
14 5
15 1
16 2
17 17
18 82
19 65
20 6
21 1
22 2
23 33
24 460
25 1313
26 326
27 7
28 1
29 2
30 65
31 2674
32 29441
33 32826
34 1957
35 8
36 1
37 2
38 129
39 15796
40 684545
41 3680126
42 1181737
43 13700
44 9
45 1
46 2
47 257
48 94042
49 16175105
50 427840626
51 794907217
52 57905114
53 109601
54 10

List of values

[1, 1, 2, 1, 2, 3, 1, 2, 5, 4, 1, 2, 9, 16, 5, 1, 2, 17, 82, 65, 6, 1, 2, 33, 460, 1313, 326, 7, 1, 2, 65, 2674, 29441, 32826, 1957, 8, 1, 2, 129, 15796, 684545, 3680126, 1181737, 13700, 9, 1, 2, 257, 94042, 16175105, 427840626, 794907217, 57905114, 109601, 10]