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A208990 as a simple table

na(n)
11
23
311
458
5351
62354
716307
8116183
9843779
106227718
1146571177
12352155364
132688196663
1420688930990
15160363122189

[1,3,11,58,351,2354,16307,116183,843779,6227718,
 46571177,352155364,2688196663,20688930990,
 160363122189]