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A056664 as a simple table

na(n)
12
218
378
4138
5222
6462
7543
81095
91418
103246
113876
124416
139506
1411090
1514601
1627810
1729187

[2,18,78,138,222,462,543,1095,1418,3246,3876,4416,
 9506,11090,14601,27810,29187]