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A099156 as a simple table

na(n)
00
11
28
360
4448
53344
624960
7186304
81390592
910379520
1077473792
11578272256
124316282880
1332217174016
14240472260608
151794909388800
1613397386067968
1799999450988544
18746406063636480
195571250705137664
2041584381386555392

[0,1,8,60,448,3344,24960,186304,1390592,10379520,
 77473792,578272256,4316282880,32217174016,
 240472260608,1794909388800,13397386067968,
 99999450988544,746406063636480,5571250705137664,
 41584381386555392]