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A048473 as a simple table

na(n)
01
15
217
353
4161
5485
61457
74373
813121
939365
10118097
11354293
121062881
133188645
149565937
1528697813
1686093441
17258280325
18774840977
192324522933
206973568801
2120920706405
2262762119217
23188286357653
24564859072961
251694577218885
265083731656657
2715251194969973

[1,5,17,53,161,485,1457,4373,13121,39365,118097,
 354293,1062881,3188645,9565937,28697813,86093441,
 258280325,774840977,2324522933,6973568801,
 20920706405,62762119217,188286357653,564859072961,
 1694577218885,5083731656657,15251194969973]