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A098817 as a simple table

na(n)
12
218
372
4780
5228
6852
7228
81080
94020
1025800
116012
1240332
13713502
14332880
15455892
166428118
174142652
18173808

[2,18,72,780,228,852,228,1080,4020,25800,6012,
 40332,713502,332880,455892,6428118,4142652,173808]