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A299155 as a simple table

na(n)
1329400
2175472640
3808214400
41367566200
51928871000
63433706640
716109533440
816916445000
917847413640
1019507068000
1123163310800
1224961167000
1332645743200
1437263088800
1539803400000
1644915270400
1750238568800
1866072283200
1981924990840
2085368457440

[329400,175472640,808214400,1367566200,1928871000,
 3433706640,16109533440,16916445000,17847413640,
 19507068000,23163310800,24961167000,32645743200,
 37263088800,39803400000,44915270400,50238568800,
 66072283200,81924990840,85368457440]