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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.

A370418 Triangle read by rows. T(n, k) = (n - k)! * (n + k)!.

Table of values

n a(n)
0 1
1 1
2 2
3 4
4 6
5 24
6 36
7 48
8 120
9 720
10 576
11 720
12 1440
13 5040
14 40320
15 14400
16 17280
17 30240
18 80640
19 362880
20 3628800
21 518400
22 604800
23 967680
24 2177280
25 7257600
26 39916800
27 479001600
28 25401600
29 29030400
30 43545600
31 87091200
32 239500800
33 958003200
34 6227020800
35 87178291200

List of values

[1, 1, 2, 4, 6, 24, 36, 48, 120, 720, 576, 720, 1440, 5040, 40320, 14400, 17280, 30240, 80640, 362880, 3628800, 518400, 604800, 967680, 2177280, 7257600, 39916800, 479001600, 25401600, 29030400, 43545600, 87091200, 239500800, 958003200, 6227020800, 87178291200]

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

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