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A309380 as a simple table

n a(n)
3 180
4 240
5 1380
6 4200
7 15420
8 52080
9 177780
10 595320
11 1978860
12 6515520
13 21298980
14 69168840
15 223369500
16 717772560
17 2296480980
18 7319252760
19 23247851340
20 73615135200
21 232462779780
22 732245695080
23 2301319648380
24 7217727595440
25 22594530691380
26 70607719663800

[180,240,1380,4200,15420,52080,177780,595320,
 1978860,6515520,21298980,69168840,223369500,
 717772560,2296480980,7319252760,23247851340,
 73615135200,232462779780,732245695080,
 2301319648380,7217727595440,22594530691380,
 70607719663800]

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Last modified May 3 22:58 EDT 2024. Contains 372225 sequences. (Running on oeis4.)