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A322681 as a simple table

na(n)
115132960
215870624
315966240
415975036
516854684
615175160
715572856
816579134
916629354
1017492046
1117671392
1218346968
1318644448
1420598318
1520608038
1626382240
1727668256
1827843360
1927850284
2028026540
2128020384
2229474016
2329563296
2429667924
2531301556
2630743000
2731130008
2831356440
2934531750
3035220790

[15132960,15870624,15966240,15975036,16854684,
 15175160,15572856,16579134,16629354,17492046,
 17671392,18346968,18644448,20598318,20608038,
 26382240,27668256,27843360,27850284,28026540,
 28020384,29474016,29563296,29667924,31301556,
 30743000,31130008,31356440,34531750,35220790]