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Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A284970 as a simple table

na(n)
11
23591
375392
4258552
50
6459648
7787968
80
9612864
100
110
120
130
140
150
160
170
180
191741824
200
211575936

[1,3591,75392,258552,0,459648,787968,0,612864,0,0,
 0,0,0,0,0,0,0,1741824,0,1575936]