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A007806 as a simple table

na(n)
11
25
316
450
5147
6422
71210
83459
99878
1028189
1180425
12229411
13654311
141866003
155321194
1615173321
1743264523
18123357771
19351712022
201002758190
212858875748
228150529454
2323236408366
2466243882238
25188849982251
26538372895393
271534776215805
284375251800924

[1,5,16,50,147,422,1210,3459,9878,28189,80425,
 229411,654311,1866003,5321194,15173321,43264523,
 123357771,351712022,1002758190,2858875748,
 8150529454,23236408366,66243882238,188849982251,
 538372895393,1534776215805,4375251800924]