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A350654 as a simple table

na(n)
12
23
38
415
563
6120
7440
8945
92079
104095
1121735
1298175
13133056
14395199
15338625
161890945
173501576
188390304
1935820225
20126775935
21149848335
22879207616
23302464800

[2,3,8,15,63,120,440,945,2079,4095,21735,98175,
 133056,395199,338625,1890945,3501576,8390304,
 35820225,126775935,149848335,879207616,302464800]