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A047028 as a simple table

na(n)
01
14
214
348
4170
5611
62214
78135
830171
9112589
10423114
111598998
126068246
1323125097
1488441638
15339234219
161304756453
175030574435
1819436510637
1975241443220
20291780678294
211133270649257
224407906226851
2317167267446803

[1,4,14,48,170,611,2214,8135,30171,112589,423114,
 1598998,6068246,23125097,88441638,339234219,
 1304756453,5030574435,19436510637,75241443220,
 291780678294,1133270649257,4407906226851,
 17167267446803]