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A104673 as a simple table

na(n)
01
166
21386
316016
4126126
5756756
63699696
715402816
856316546
9184940756
10554822268
111540663488
124001445448
139802357488
1422805484768
1550678855040
16108088495515
17222161129190
18441579528390
19851355545040
201596291646950
212917485413700
225208073135200

[1,66,1386,16016,126126,756756,3699696,15402816,
 56316546,184940756,554822268,1540663488,
 4001445448,9802357488,22805484768,50678855040,
 108088495515,222161129190,441579528390,
 851355545040,1596291646950,2917485413700,
 5208073135200]