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A283846 as a simple table

na(n)
12
26
310
431
568
6226
7650
82259
97542
1027036
1196350
12352786
131294652
144806366
1517912120
1667160083
17252710672
18954641186
193617076710
2013744708060
2152358745532
22199914446106
23764881848410
242932043941394
2511259015845684
2643303894193076
27166800053312630

[2,6,10,31,68,226,650,2259,7542,27036,96350,
 352786,1294652,4806366,17912120,67160083,
 252710672,954641186,3617076710,13744708060,
 52358745532,199914446106,764881848410,
 2932043941394,11259015845684,43303894193076,
 166800053312630]