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A047790 as a simple table

na(n)
00
10
20
31
46
524
681
7250
8732
92073
105742
1115664
1242273
13113202
14301428
15799273
162112774
175571816
1814668209
1938563882
20101285580
21265817145
22697214430
231827923296
244790749761
2512552714594
2632884171236
2786133353545
28225582998262
29590749858968
301546935014097

[0,0,0,1,6,24,81,250,732,2073,5742,15664,42273,
 113202,301428,799273,2112774,5571816,14668209,
 38563882,101285580,265817145,697214430,1827923296,
 4790749761,12552714594,32884171236,86133353545,
 225582998262,590749858968,1546935014097]