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A027540 as a simple table

na(n)
23
316
455
5156
6399
7960
82223
95020
1011143
1124432
1253079
13114492
14245535
15524032
161113823
172358972
184980375
1910485360
2022019655
2146136860
2296468463
23201326016
24419429775
25872414556
261811938599
273758095600
287784627383
2916106126460
3033285995583
3168719475712

[3,16,55,156,399,960,2223,5020,11143,24432,53079,
 114492,245535,524032,1113823,2358972,4980375,
 10485360,22019655,46136860,96468463,201326016,
 419429775,872414556,1811938599,3758095600,
 7784627383,16106126460,33285995583,68719475712]