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A054452 as a simple table

na(n)
00
10
21
35
417
550
6138
7370
8979
92575
106755
1117700
1246356
13121380
14317797
15832025
162178293
175702870
1814930334
1939088150
20102334135
21267914275
22701408711
231836311880
244807526952
2512586269000
2632951280073
2786267571245
28225851433689
29591286729850

[0,0,1,5,17,50,138,370,979,2575,6755,17700,46356,
 121380,317797,832025,2178293,5702870,14930334,
 39088150,102334135,267914275,701408711,1836311880,
 4807526952,12586269000,32951280073,86267571245,
 225851433689,591286729850]