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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.

A048854 Triangle read by rows. A generalization of unsigned Lah numbers, called L[4,1].

Table of values

n a(n)
0 1
1 2
2 1
3 12
4 12
5 1
6 120
7 180
8 30
9 1
10 1680
11 3360
12 840
13 56
14 1
15 30240
16 75600
17 25200
18 2520
19 90
20 1
21 665280
22 1995840
23 831600
24 110880
25 5940
26 132
27 1
28 17297280
29 60540480
30 30270240
31 5045040
32 360360
33 12012
34 182
35 1
36 518918400
37 2075673600
38 1210809600
39 242161920
40 21621600
41 960960
42 21840
43 240
44 1
45 17643225600
46 79394515200
47 52929676800
48 12350257920
49 1323241920
50 73513440
51 2227680
52 36720
53 306
54 1

List of values

[1, 2, 1, 12, 12, 1, 120, 180, 30, 1, 1680, 3360, 840, 56, 1, 30240, 75600, 25200, 2520, 90, 1, 665280, 1995840, 831600, 110880, 5940, 132, 1, 17297280, 60540480, 30270240, 5045040, 360360, 12012, 182, 1, 518918400, 2075673600, 1210809600, 242161920, 21621600, 960960, 21840, 240, 1, 17643225600, 79394515200, 52929676800, 12350257920, 1323241920, 73513440, 2227680, 36720, 306, 1]

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