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A002222 as a simple table

na(n)
11
26
321
491
5266
6994
72562
87764
919482
1051212
11116028
12288541
13612463
141375609
152862437
166036606
1711846488
1824080685
1945506290

[1,6,21,91,266,994,2562,7764,19482,51212,116028,
 288541,612463,1375609,2862437,6036606,11846488,
 24080685,45506290]