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A000644 as a simple table

na(n)
11
21
33
47
531
6138
7808
84956
933047
10227328
111614793
1211710299
1386495618
14648399937
154923728056

[1,1,3,7,31,138,808,4956,33047,227328,1614793,
 11710299,86495618,648399937,4923728056]