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A284218 as a simple table

na(n)
16
244
3499
46511
591260
61317770
719371893
8288303232
94330336770
1065507133232
11996599090507
1215232184395483
13233708530421124
143597476814925298
1555530194727444557
16859222993580853779
1713322830756899018309

[6,44,499,6511,91260,1317770,19371893,288303232,
 4330336770,65507133232,996599090507,
 15232184395483,233708530421124,3597476814925298,
 55530194727444557,859222993580853779,
 13322830756899018309]