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A273296 as a simple table

na(n)
01
18
245
3201
4893
53669
614681
759225
8236129
9949025
103799221
1115201629
1260826393
13243324769
14973332773
153893457909

[1,8,45,201,893,3669,14681,59225,236129,949025,
 3799221,15201629,60826393,243324769,973332773,
 3893457909]