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A368888 as a simple table

na(n)
01
11
25
319
4305
51976
654613
7494901
819460545
9226000855
1011535280901
11163226844144
1210246715573041
13170910034261721
1412736193619206485
15244588264748170651
1621100437309369290497
17458426839205360652760
1844935948904379592796101

[1,1,5,19,305,1976,54613,494901,19460545,
 226000855,11535280901,163226844144,10246715573041,
 170910034261721,12736193619206485,
 244588264748170651,21100437309369290497,
 458426839205360652760,44935948904379592796101]