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A261539 as a simple table

n a(n)
1 0
2 1
3 2
4 3
5 6
6 9
7 12
8 21
9 42
10 150
11 195
12 390
13 411
14 1215
15 2754
16 2757
17 3246
18 6186
19 11340
20 12885
21 84708
22 87120
23 191772
24 503919
25 786441

[0,1,2,3,6,9,12,21,42,150,195,390,411,1215,2754,
 2757,3246,6186,11340,12885,84708,87120,191772,
 503919,786441]

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Last modified January 19 03:54 EST 2020. Contains 331031 sequences. (Running on oeis4.)