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A327734 as a simple table

na(n)
10
20
30
40
50
60
71
82
97
1012
1131
1257
13126
14232
15484
16900
171800
183388
196643
2012594
2124457
2246624
2390157
24172680
25333498
26641088
271238664
282388357
294620006
308931052

[0,0,0,0,0,0,1,2,7,12,31,57,126,232,484,900,1800,
 3388,6643,12594,24457,46624,90157,172680,333498,
 641088,1238664,2388357,4620006,8931052]