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A181365 as a simple table

na(n)
12
26
31
422
52
678
73
81
9272
106
112
12940
1313
142
151
163232
1728
182
192
2011080
2158
223
232
241
2537920
26118
276
282
292
30129648
31239
3212
332
342
351
36443008
37484
3822
392
402
412
421513248
43979
4437
453
462
472
481
495168000
501976
5160
526
532
542
552
5617647552
573980
5897
5912
602
612
622
631
6460258304
658004

[2,6,1,22,2,78,3,1,272,6,2,940,13,2,1,3232,28,2,2,
 11080,58,3,2,1,37920,118,6,2,2,129648,239,12,2,2,
 1,443008,484,22,2,2,2,1513248,979,37,3,2,2,1,
 5168000,1976,60,6,2,2,2,17647552,3980,97,12,2,2,2,
 1,60258304,8004]