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A246528 as a simple table

na(n)
01
11
24
325
4224
52601
637072
7626137
812232320
9271494865
106750538496
11185923318329
125619645500416
13184961854976185
146585429015521280
15252203521861645561
1610338251689510381568
17451650823526438037153
1820949317446607098716160
191028215744082428119960025

[1,1,4,25,224,2601,37072,626137,12232320,
 271494865,6750538496,185923318329,5619645500416,
 184961854976185,6585429015521280,
 252203521861645561,10338251689510381568,
 451650823526438037153,20949317446607098716160,
 1028215744082428119960025]