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A059721 as a simple table

na(n)
00
11
221
3182
4910
53255
69331
722876
849932
999645
10185185
11324786
12542906
13871507
141351455
152034040
162982616
174274361
186002157
198276590
2011228070
2115009071
2219796491
2325794132
2433235300
2542385525
2653545401
2767053546

[0,1,21,182,910,3255,9331,22876,49932,99645,
 185185,324786,542906,871507,1351455,2034040,
 2982616,4274361,6002157,8276590,11228070,15009071,
 19796491,25794132,33235300,42385525,53545401,
 67053546]