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A230348 as a simple table

n a(n)
0 1
1 18
2 349
3 7672
4 192240
5 5454144
6 173606040
7 6143195520
8 239656253760
9 10231052832000
10 474832908950400
11 23819880180096000
12 1284985968634368000
13 74207855717259264000
14 4569213387521502720000
15 298885288012537901875200
16 20702796608070625112064000

[1,18,349,7672,192240,5454144,173606040,
 6143195520,239656253760,10231052832000,
 474832908950400,23819880180096000,
 1284985968634368000,74207855717259264000,
 4569213387521502720000,298885288012537901875200,
 20702796608070625112064000]

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Last modified June 6 13:31 EDT 2020. Contains 334827 sequences. (Running on oeis4.)