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A368209 as a simple table

na(n)
00
10
21
32
43
56
629
7604
869724
949836144
10250872492816
1110113420362487552
123669877057922582621184
1313317216838086531218401935360
14531580547910000731718546175028428800
15254627927130379381409123944181515703549952000

[0,0,1,2,3,6,29,604,69724,49836144,250872492816,
 10113420362487552,3669877057922582621184,
 13317216838086531218401935360,
 531580547910000731718546175028428800,
 254627927130379381409123944181515703549952000]