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A001080 as a simple table

n a(n)
0 0
1 3
2 48
3 765
4 12192
5 194307
6 3096720
7 49353213
8 786554688
9 12535521795
10 199781794032
11 3183973182717
12 50743789129440
13 808716652888323
14 12888722657083728
15 205410845860451325
16 3273684811110137472
17 52173546131901748227
18 831503053299317834160

[0,3,48,765,12192,194307,3096720,49353213,
 786554688,12535521795,199781794032,3183973182717,
 50743789129440,808716652888323,12888722657083728,
 205410845860451325,3273684811110137472,
 52173546131901748227,831503053299317834160]

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Last modified February 18 10:13 EST 2019. Contains 320250 sequences. (Running on oeis4.)