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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.

A344498 a(n) = |Stirling1(n, floor(n/2))| * floor(n/2)!.

Table of values

n a(n)
0 1
1 0
2 1
3 2
4 22
5 100
6 1350
7 9744
8 162456
9 1614816
10 32319000
11 410031600
12 9604465200
13 148370508000
14 3986353491120
15 72622987557120
16 2202727143576960
17 46243059751848960
18 1563325251963995520
19 37165349757066935040
20 1385918755006365216000
21 36804377751967949760000

List of values

[1, 0, 1, 2, 22, 100, 1350, 9744, 162456, 1614816, 32319000, 410031600, 9604465200, 148370508000, 3986353491120, 72622987557120, 2202727143576960, 46243059751848960, 1563325251963995520, 37165349757066935040, 1385918755006365216000, 36804377751967949760000]

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

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