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A000380 as a simple table

na(n)
36
48
540
6176
71421
810352
993114
10912920
119929997
12117970704
131521176826
1421150414880
15315400444070
165020920314016
1784979755347122
181523710321272384
1928851091193764023
20575253584489378040
2112047084261153160394
22264377395040950523112
236066972656940255290199

[6,8,40,176,1421,10352,93114,912920,9929997,
 117970704,1521176826,21150414880,315400444070,
 5020920314016,84979755347122,1523710321272384,
 28851091193764023,575253584489378040,
 12047084261153160394,264377395040950523112,
 6066972656940255290199]