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A247452型作为一个简单的表

n个a(n)
01
1
218
135
41215
512636
6147987
71917999
827162540
9416236401
106848207775
11120206639790
122239278203277
1344074161731151
14913065539247018
1519843943547060315
16451135755042249987
1710701182793462338052
18264250529777677991751
196779171511882363638619
20180350988089950776032172

[1,3,18,135,1215,12636,147987,1917999,27162540,416236401,6848207775,120206639790,2239278203277,44074161731151,913065539247018,19843943547060315,451135755042249987,10701182793462338052,264250529777677991751,6779171511882363638619,180350988089950776032172]