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A038156 as a simple table

na(n)
00
10
22
39
440
5205
61236
78659
869280
9623529
106235300
1168588311
12823059744
1310699776685
14149796873604
152246953104075
1635951249665216
17611171244308689
1811001082397556420
19209020565553571999
204180411311071440000
2187788637532500240021
221931350025715005280484

[0,0,2,9,40,205,1236,8659,69280,623529,6235300,
 68588311,823059744,10699776685,149796873604,
 2246953104075,35951249665216,611171244308689,
 11001082397556420,209020565553571999,
 4180411311071440000,87788637532500240021,
 1931350025715005280484]