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A249877 as a simple table

na(n)
1805
21365
32335
44019
56949
612053
720942
836396
963995
10112578
11197966
12347897
13610999
141072605
151882670
163313692
175836415
1810279049
1918094244
2031833358
2155982977
2298442660
23173298007
24305212887
25537598707
26946696326
271666491232

[805,1365,2335,4019,6949,12053,20942,36396,63995,
 112578,197966,347897,610999,1072605,1882670,
 3313692,5836415,10279049,18094244,31833358,
 55982977,98442660,173298007,305212887,537598707,
 946696326,1666491232]