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A294005 as a simple table

na(n)
31
42
57
622
768
8218
9721
102438
118491
1230478
13112524
14428382
151678600
166778708
1728169286
18120516092
19530081370
202396797920
2111125584584
2252993063796
23258676491628
241293160049244
256612750833996
2634564483264256
27184470133103464
281004514566402816

[1,2,7,22,68,218,721,2438,8491,30478,112524,
 428382,1678600,6778708,28169286,120516092,
 530081370,2396797920,11125584584,52993063796,
 258676491628,1293160049244,6612750833996,
 34564483264256,184470133103464,1004514566402816]