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A218317 as a simple table

na(n)
149
23969
3261121
416654561
51065434881
668184176641
74363582588561
8279254546449921
917871334586731521
101143704311285736641
1173193166320198831361
124684112443348657152001
13299767184304336708080625

[49,3969,261121,16654561,1065434881,68184176641,
 4363582588561,279254546449921,17871334586731521,
 1143704311285736641,73193166320198831361,
 4684112443348657152001,299767184304336708080625]