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A238412 as a simple table

na(n)
22
39
49
536
636
764
864
9144
10144
11144
12240
13240
14240
15576
16625
17240
18900
19625
20960
21960
22576
23900
242250
252304
26900
273375
281536
29960
303600
31576
327776
332304
34960
353840
368100
372250
382250
393600
409000
41900
425760
431536
443840
4513500
463375
473600
4827216
496400
5014400
513840
525760
537776
5429160
559216
5614000
579000

[2,9,9,36,36,64,64,144,144,144,240,240,240,576,
 625,240,900,625,960,960,576,900,2250,2304,900,
 3375,1536,960,3600,576,7776,2304,960,3840,8100,
 2250,2250,3600,9000,900,5760,1536,3840,13500,3375,
 3600,27216,6400,14400,3840,5760,7776,29160,9216,
 14000,9000]