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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.

A344397 a(n) = Stirling2(n, floor(n/2)) * floor(n/2)!.

Table of values

n a(n)
0 1
1 0
2 1
3 1
4 14
5 30
6 540
7 1806
8 40824
9 186480
10 5103000
11 29607600
12 953029440
13 6711344640
14 248619571200
15 2060056318320
16 86355926616960
17 823172919528960
18 38528927611574400
19 415357755774998400
20 21473732319740064000
21 258323865658578720000
22 14620825330739032204800

List of values

[1, 0, 1, 1, 14, 30, 540, 1806, 40824, 186480, 5103000, 29607600, 953029440, 6711344640, 248619571200, 2060056318320, 86355926616960, 823172919528960, 38528927611574400, 415357755774998400, 21473732319740064000, 258323865658578720000, 14620825330739032204800]

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

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