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A327993 as a simple table

na(n)
01
13
27
320
455
5151
6414
71133
83099
98472
1023155
1163275
12172894
13472393
141290663
153526256
169634071
1726321031
1871910814
19196464677
20536752579
211466437096
224006383531
2310945648019
2429904074046
2581699461841
26223207100431
27609813170912
281666040617711
294551707698639

[1,3,7,20,55,151,414,1133,3099,8472,23155,63275,
 172894,472393,1290663,3526256,9634071,26321031,
 71910814,196464677,536752579,1466437096,
 4006383531,10945648019,29904074046,81699461841,
 223207100431,609813170912,1666040617711,
 4551707698639]