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A156304 as a simple table

na(n)
01
11
28
321
477
5199
6661
71663
84852
912382
1033289
1182877
12213026
13518109
141279852
153053404
167312985
1717093793
1839952528
1991661695
20209709116
21473095589
221062567288
232359804486
245214774263
2511415904502
2624860918943
2753709881911

[1,1,8,21,77,199,661,1663,4852,12382,33289,82877,
 213026,518109,1279852,3053404,7312985,17093793,
 39952528,91661695,209709116,473095589,1062567288,
 2359804486,5214774263,11415904502,24860918943,
 53709881911]