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.

A379459 Array read by downward antidiagonals: A(n,k) = A(n-1,k+1) + 2*(k+1)!*Sum_{j=0..k} A(n-1,j)/j! with A(0,k) = 2*(k+1)!, n >= 0, k >= 0.

Table of values

n a(n)
0 2
1 4
2 8
3 12
4 36
5 52
6 48
7 192
8 368
9 472
10 240
11 1200
12 2880
13 4560
14 5504
15 1440
16 8640
17 24960
18 47280
19 67408
20 78416
21 10080
22 70560
23 238560
24 527520
25 871584
26 1163232
27 1320064
28 80640
29 645120
30 2499840
31 6330240
32 11926656
33 18031104
34 22997696
35 25637824
36 725760
37 6531840
38 28546560
39 81527040
40 172811520
41 292642560
42 415728960
43 513000000
44 564275648

List of values

[2, 4, 8, 12, 36, 52, 48, 192, 368, 472, 240, 1200, 2880, 4560, 5504, 1440, 8640, 24960, 47280, 67408, 78416, 10080, 70560, 238560, 527520, 871584, 1163232, 1320064, 80640, 645120, 2499840, 6330240, 11926656, 18031104, 22997696, 25637824, 725760, 6531840, 28546560, 81527040, 172811520, 292642560, 415728960, 513000000, 564275648]