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A081018 as a simple table

na(n)
00
12
215
3104
4714
54895
633552
7229970
81576239
910803704
1074049690
11507544127
123478759200
1323843770274
14163427632719
151120149658760
167677619978602
1752623190191455
18360684711361584
192472169789339634
2016944503814015855
21116139356908771352
22796030994547383610

[0,2,15,104,714,4895,33552,229970,1576239,
 10803704,74049690,507544127,3478759200,
 23843770274,163427632719,1120149658760,
 7677619978602,52623190191455,360684711361584,
 2472169789339634,16944503814015855,
 116139356908771352,796030994547383610]