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A084081 as a simple table

na(n)
00
11
22
35
410
524
650
7121
8260
9637
101400
113468
127752
1319380
1443890
15110561
16253000
17641355
181480050
193771885
208765250
2122439040
2252451256
23134796060
24316663760
25816540124
261926501200
274982228488
2811798983280
2930593078076
3072690164850

[0,1,2,5,10,24,50,121,260,637,1400,3468,7752,
 19380,43890,110561,253000,641355,1480050,3771885,
 8765250,22439040,52451256,134796060,316663760,
 816540124,1926501200,4982228488,11798983280,
 30593078076,72690164850]