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A084601 as a simple table

na(n)
01
11
25
313
449
5161
6581
72045
87393
926689
1097285
11355565
121305745
134808545
1417760965
1565753693
16243954113
17906758785
183375949829
1912587460557
2046995614449
21175669746209
22657370655045
232462383495357
249232029156001

[1,1,5,13,49,161,581,2045,7393,26689,97285,355565,
 1305745,4808545,17760965,65753693,243954113,
 906758785,3375949829,12587460557,46995614449,
 175669746209,657370655045,2462383495357,
 9232029156001]