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A027095 as a simple table

na(n)
41
51
65
717
857
9193
10650
112173
127199
1323619
1476746
15247103
16788934
172499707
187866233
1924603551
2076538239
21236960031
22730506849
232243545795
246867375720
2520958167581
2663791696431
27193708118293
28586967142587
291775245686845

[1,1,5,17,57,193,650,2173,7199,23619,76746,247103,
 788934,2499707,7866233,24603551,76538239,
 236960031,730506849,2243545795,6867375720,
 20958167581,63791696431,193708118293,586967142587,
 1775245686845]