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A026953 as a simple table

na(n)
21
38
441
5272
61168
77428
830302
9189808
10759101
114724160
1218728841
13116207424
14458829051
152842936320
1611203933255
1769378730880
18273211969075
191691519468760
206660034471595
2141235710124400
22162381981186970
231005560117623204
243961069262796800
2524534901740913872

[1,8,41,272,1168,7428,30302,189808,759101,4724160,
 18728841,116207424,458829051,2842936320,
 11203933255,69378730880,273211969075,
 1691519468760,6660034471595,41235710124400,
 162381981186970,1005560117623204,3961069262796800,
 24534901740913872]