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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.

A156992 Triangle T(n,k) = n!*binomial(n-1, k-1) for 1 <= k <= n, read by rows.

Table of values

n a(n)
1 1
2 2
3 2
4 6
5 12
6 6
7 24
8 72
9 72
10 24
11 120
12 480
13 720
14 480
15 120
16 720
17 3600
18 7200
19 7200
20 3600
21 720
22 5040
23 30240
24 75600
25 100800
26 75600
27 30240
28 5040
29 40320
30 282240
31 846720
32 1411200
33 1411200
34 846720
35 282240
36 40320
37 362880
38 2903040
39 10160640
40 20321280
41 25401600
42 20321280
43 10160640
44 2903040
45 362880

List of values

[1, 2, 2, 6, 12, 6, 24, 72, 72, 24, 120, 480, 720, 480, 120, 720, 3600, 7200, 7200, 3600, 720, 5040, 30240, 75600, 100800, 75600, 30240, 5040, 40320, 282240, 846720, 1411200, 1411200, 846720, 282240, 40320, 362880, 2903040, 10160640, 20321280, 25401600, 20321280, 10160640, 2903040, 362880]

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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