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A139526号作为一个简单的表

n个a(n)
21
1
42
51
66
79
81
912
1048
1164
121
1320
14150
15500
16625
171
1830
19360
202160
216480
227776
231
2442
25735
266860
2736015
28100842
29117649
301
3156
321344
3317920
34143360
35688128
361835008
372097152
381
3972
402268
4140824
42459270
433306744
4414880348
4538263752
4643046721
471
4890
493600
5084000
511260000
5212600000
5384000000
54360000000
55900000000
561000000000

[1,1,2,1,6,9,1,12,48,64,1,20,150,500,625,1,30,360,2160,6480,7776,1,42,735,6860,36015,100842,117649,1,56,1344,17920,143360,688128,1835008,2097152,1,72,2268,40824,459270,3306744,14880348,38263752,43046721,1,90,3600,84000,1260000,12600000,84000000,360000000,900000000,1000000000]