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A297069 as a simple table

na(n)
18
2103
31292
416059
5214205
62883705
738753117
8521094462
97010388932
1094315578610
111268880776347
1217071093252066
13229669459832452
143089905546013391
1541570682341645865
16559279797267154090

[8,103,1292,16059,214205,2883705,38753117,
 521094462,7010388932,94315578610,1268880776347,
 17071093252066,229669459832452,3089905546013391,
 41570682341645865,559279797267154090]