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A105784 as a simple table

na(n)
10
21
33
419
5155
61641
721427
8334377
96085683
10126745435
112975448641
1277779634571
132241339267037
1470604384569005
152414086713172695
1689049201691604881
173525160713653081279
18149075374211881719939
196707440248292609651513
20319946143503599791200675

[0,1,3,19,155,1641,21427,334377,6085683,126745435,
 2975448641,77779634571,2241339267037,
 70604384569005,2414086713172695,89049201691604881,
 3525160713653081279,149075374211881719939,
 6707440248292609651513,319946143503599791200675]