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A018986 as a simple table

na(n)
22
38
444
5192
61128
76451
837264
9235812
101515012
1110105375
1269010670
13477935331
143341537527
1523495024258
16165910365412

[2,8,44,192,1128,6451,37264,235812,1515012,
 10105375,69010670,477935331,3341537527,
 23495024258,165910365412]