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A301353 as a simple table

na(n)
18
2981
339390
41392131
548476633
61702789144
759990521481
82112136719464
974331048515102
102616023120767407
1192071029240759757
123240450558843642214
13114047892100718342015
144013922484956252317237
15141270244696020479378913

[8,981,39390,1392131,48476633,1702789144,
 59990521481,2112136719464,74331048515102,
 2616023120767407,92071029240759757,
 3240450558843642214,114047892100718342015,
 4013922484956252317237,141270244696020479378913]