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A292619 as a simple table

na(n)
01
13
28
321
454
5144
6404
71195
83712
912000
1039994
11136400
12473430
131665868
145926476
1521275805
1676964808
17280250088
181026309908
193777411342
2013965286180
2151837285776
22193107846304
23721732334136
242705480787422
2510169387310362
2638320472420462
27144733083435688

[1,3,8,21,54,144,404,1195,3712,12000,39994,136400,
 473430,1665868,5926476,21275805,76964808,
 280250088,1026309908,3777411342,13965286180,
 51837285776,193107846304,721732334136,
 2705480787422,10169387310362,38320472420462,
 144733083435688]