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A186070 as a simple table

na(n)
11
21
31
413
513
6608
74094
81875397
9143639306
105613099946
1120207317759
121474035260669

[1,1,1,13,13,608,4094,1875397,143639306,
 5613099946,20207317759,1474035260669]