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A085831 as a simple table

na(n)
01
13
28
320
450
5119
6280
7645
81466
93280
107262
1115937
1234720
1375108
14161552
15345785
16736974
171564762
183311206
196985780
2014698342
2130850276
2264607782
23135030018
24281689074
25586636098
261219788256
272532608855
285251282902
2910874696106
3022493653324
3146475828418

[1,3,8,20,50,119,280,645,1466,3280,7262,15937,
 34720,75108,161552,345785,736974,1564762,3311206,
 6985780,14698342,30850276,64607782,135030018,
 281689074,586636098,1219788256,2532608855,
 5251282902,10874696106,22493653324,46475828418]