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A218008 as a simple table

na(n)
00
10
22
34
410
518
638
768
8138
9250
10502
11922
121846
133430
146862
1512868
1625738
1748618
1897238
19184754
20369510
21705430
221410862
232704154
245408310
2510400598
2620801198
2740116598
2880233198
29155117518
30310235038

[0,0,2,4,10,18,38,68,138,250,502,922,1846,3430,
 6862,12868,25738,48618,97238,184754,369510,705430,
 1410862,2704154,5408310,10400598,20801198,
 40116598,80233198,155117518,310235038]