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A260493 as a simple table

na(n)
148
2136
3868
43603
55848
631078
7155232
8356236
91433220
108676027
1128104408
1296675895
13569988256
142581001066
159580891800
1649283809387
17267771460624

[48,136,868,3603,5848,31078,155232,356236,1433220,
 8676027,28104408,96675895,569988256,2581001066,
 9580891800,49283809387,267771460624]