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A305404 as a simple table

na(n)
01
11
24
325
4217
52416
632839
7527185
89761602
9204800551
104801461049
11124402647370
123529848676237
13108859319101261
143625569585663484
15129689000146431205
164958830249864725997
17201834650901695603296
188712774828941647677019
19397596632650906687905565

[1,1,4,25,217,2416,32839,527185,9761602,204800551,
 4801461049,124402647370,3529848676237,
 108859319101261,3625569585663484,
 129689000146431205,4958830249864725997,
 201834650901695603296,8712774828941647677019,
 397596632650906687905565]