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A274892 as a simple table

na(n)
18
2108
386
4290
5913
63017
79863
832539
9107369
10354366
111171235
123869271
1312787884
1442266197
15139689475
16461723614
171526118256
185044271535
1916673106905
2055109948877
21182157291955
22602093030588
231990121537282
246578044463591

[8,108,86,290,913,3017,9863,32539,107369,354366,
 1171235,3869271,12787884,42266197,139689475,
 461723614,1526118256,5044271535,16673106905,
 55109948877,182157291955,602093030588,
 1990121537282,6578044463591]