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A047048 as a simple table

na(n)
01
14
214
348
4165
5586
62114
77694
828173
9104370
10389751
111463288
125514820
1320894454
1479510118
15303570094
161161991698
174460728710
1817168879077
1966225380848
20255907081225
21990671100502
223841609763148
2314919279265464

[1,4,14,48,165,586,2114,7694,28173,104370,389751,
 1463288,5514820,20894454,79510118,303570094,
 1161991698,4460728710,17168879077,66225380848,
 255907081225,990671100502,3841609763148,
 14919279265464]