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A299293 as a simple table

na(n)
01
12
24
37
417
531
680
7152
8404
9790
102140
114271
1211729
1323767
1465952
15135221
16378321
17782968
182205168
194598804
2013023324
2127332956
2277761008

[1,2,4,7,17,31,80,152,404,790,2140,4271,11729,
 23767,65952,135221,378321,782968,2205168,4598804,
 13023324,27332956,77761008]