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A121661 as a simple table

na(n)
11
26
355
4556
57839
6118141
72488800
854871741
91374282325
1035786212191
111182319284628
1240234641889543
131409394785418633
1453597236487797597
152091701617809524916
1696271871655725943733
174719413412748380767833

[1,6,55,556,7839,118141,2488800,54871741,
 1374282325,35786212191,1182319284628,
 40234641889543,1409394785418633,53597236487797597,
 2091701617809524916,96271871655725943733,
 4719413412748380767833]