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A369365 as a simple table

na(n)
11
21
32
46
516
650
7150
8458
91388
104233
1112875
1239227
13119456
14363868
151107912
163372793
1710264156
1831228969

[1,1,2,6,16,50,150,458,1388,4233,12875,39227,
 119456,363868,1107912,3372793,10264156,31228969]