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A321109 as a simple table

n a(n)
1 1
2 3
3 120
4 14490
5 3472200
6 1368656352
7 799089568704
8 646368125624208
9 691455367099357920
10 945212125833646957440
11 1607847054961982310495360
12 3331923827097057308557968384
13 8266530005101303527012249628800
14 24199480411463293209043241824200960
15 82559430544523811331164210671638394880
16 324767777154180733152754873992738391947264
17 1459453773372794878685570187904547878429951488 

[1,3,120,14490,3472200,1368656352,799089568704,
 646368125624208,691455367099357920,
 945212125833646957440,1607847054961982310495360,
 3331923827097057308557968384,
 8266530005101303527012249628800,
 24199480411463293209043241824200960,
 82559430544523811331164210671638394880,
 324767777154180733152754873992738391947264,
 1459453773372794878685570187904547878429951488]

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)