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A307075 as a simple table

na(n)
01
11
24
315
447
5160
6517
71721
85668
918687
1061687
11203448
12671253
132214377
147305308
1524100319
1679506903
17262294336
18865310405
192854666385
209417565852
2131068622271
22102495625503
23338133855032
241115506197957
253680063534409
2612140557957708
2740051794232519
28132131177728807

[1,1,4,15,47,160,517,1721,5668,18687,61687,203448,
 671253,2214377,7305308,24100319,79506903,
 262294336,865310405,2854666385,9417565852,
 31068622271,102495625503,338133855032,
 1115506197957,3680063534409,12140557957708,
 40051794232519,132131177728807]