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A216643 as a simple table

na(n)
11
21
31
41
51
61
71
81
91
101
111
122
134
148
1521
1645
17159
18483
191397
204252
2112860

[1,1,1,1,1,1,1,1,1,1,1,2,4,8,21,45,159,483,1397,
 4252,12860]