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A054661 as a simple table

na(n)
11
20
35
412
551
6160
7585
82016
97280
1026112
1195325
12349180
131290555
144792320
1517895679
1667104768
17252645135
18954422560
193616814565
2013743842916
2152357696365
22199911014400
23764877654105
242932030307680
2511258999068416

[1,0,5,12,51,160,585,2016,7280,26112,95325,349180,
 1290555,4792320,17895679,67104768,252645135,
 954422560,3616814565,13743842916,52357696365,
 199911014400,764877654105,2932030307680,
 11258999068416]