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A003321 as a simple table

n a(n)
1 2
2 0
3 153
4 1634
5 4150
6 548834
7 1741725
8 24678050
9 146511208
10 4679307774
11 32164049650
12 0
13 564240140138
14 28116440335967
15 0
16 4338281769391370
17 233411150132317
18 0
19 1517841543307505039
20 63105425988599693916

[2,0,153,1634,4150,548834,1741725,24678050,
 146511208,4679307774,32164049650,0,564240140138,
 28116440335967,0,4338281769391370,233411150132317,
 0,1517841543307505039,63105425988599693916]

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Last modified February 27 15:59 EST 2020. Contains 332307 sequences. (Running on oeis4.)