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A051844 as a simple table

na(n)
02
16
230
390
41530
516830
6218790
79407970
82417848290
9137817352530
1028252557268650
1119296496614487950
124650455684091595950
1312700394473254148539450
1441619192688853844763777650
1513775952780010622616810402150
16902834617343556174437903325704550

[2,6,30,90,1530,16830,218790,9407970,2417848290,
 137817352530,28252557268650,19296496614487950,
 4650455684091595950,12700394473254148539450,
 41619192688853844763777650,
 13775952780010622616810402150,
 902834617343556174437903325704550]