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A000637 as a simple table

na(n)
01
10
21
32
47
58
637
740
8200
9258
101039
111501
127629
1310109
1454322
1583975
16527036
17780193
185808293

[1,0,1,2,7,8,37,40,200,258,1039,1501,7629,10109,
 54322,83975,527036,780193,5808293]