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A013961 as a simple table

na(n)
11
28193
31594324
467117057
51220703126
613062296532
796889010408
8549822930945
92541867422653
1010001220711318
1134522712143932
12107006334784468
13302875106592254
14793811662272744
151946196290656824
164504149450301441
179904578032905938
1820825519793796029
1942052983462257060

[1,8193,1594324,67117057,1220703126,13062296532,
 96889010408,549822930945,2541867422653,
 10001220711318,34522712143932,107006334784468,
 302875106592254,793811662272744,1946196290656824,
 4504149450301441,9904578032905938,
 20825519793796029,42052983462257060]