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A364605 as a simple table

na(n)
10
20
30
40
55
644
7147
8464
91236
103100
117293
1216472
1335919
1476216
15158040
16321472
17643229
181268868
192472147
204764120
219092300
2217202636
2332294277
2460199088
25111498175
26205306192
27376014960
28685273120
291243205205
302245893340
314041415347
327245914176
3312947137412

[0,0,0,0,5,44,147,464,1236,3100,7293,16472,35919,
 76216,158040,321472,643229,1268868,2472147,
 4764120,9092300,17202636,32294277,60199088,
 111498175,205306192,376014960,685273120,
 1243205205,2245893340,4041415347,7245914176,
 12947137412]