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A015535 as a simple table

na(n)
00
11
25
327
4145
5779
64185
722483
8120785
9648891
103486025
1118727907
12100611585
13540513739
142903791865
1515599986803
1683807517745
17450237562331
182418802847145
1912994489360387
2069810052496225
21375039241201899
222014816311001945
2310824160037413523

[0,1,5,27,145,779,4185,22483,120785,648891,
 3486025,18727907,100611585,540513739,2903791865,
 15599986803,83807517745,450237562331,
 2418802847145,12994489360387,69810052496225,
 375039241201899,2014816311001945,
 10824160037413523]