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A145886 as a simple table

n a(n)
1 0
2 1
3 0
4 12
5 50
6 405
7 3234
8 29680
9 300348
10 3337425
11 40382540
12 528644556
13 7445076990
14 112248853717
15 1803999433950
16 30788257007040
17 556112892188504
18 10598857474652865
19 212565974908314168
20 4475073155964510700

[0,1,0,12,50,405,3234,29680,300348,3337425,
 40382540,528644556,7445076990,112248853717,
 1803999433950,30788257007040,556112892188504,
 10598857474652865,212565974908314168,
 4475073155964510700]

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Last modified August 24 07:11 EDT 2024. Contains 375409 sequences. (Running on oeis4.)