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A147456 as a simple table

na(n)
11
21
31
41
51
61
71
81
91
103
116
1211
1318
1427
1552
16137
17404
181237
193559
2010401
2131124
22115055
23457260
242084424
259632056

[1,1,1,1,1,1,1,1,1,3,6,11,18,27,52,137,404,1237,
 3559,10401,31124,115055,457260,2084424,9632056]