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A217144 as a simple table

na(n)
01
10
24
321
4204
52500
638709
7730420
816409180
9430786429
1013019414196
11447437830704
1217306961847705
13746907935199264
1435695643204860420
151876878693983656605
16107956500727342113004
176758630146906528885412
18458470139353155531447869

[1,0,4,21,204,2500,38709,730420,16409180,
 430786429,13019414196,447437830704,17306961847705,
 746907935199264,35695643204860420,
 1876878693983656605,107956500727342113004,
 6758630146906528885412,458470139353155531447869]