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A012834 as a simple table

na(n)
01
12
240
31192
487680
59890432
61736725120
7424537276672
8139089326735360
958613115790118912
1030905365440751206400
1119924657840958605361152
1215419390055940961625866240
1314105236549373087746555707392

[1,2,40,1192,87680,9890432,1736725120,
 424537276672,139089326735360,58613115790118912,
 30905365440751206400,19924657840958605361152,
 15419390055940961625866240,
 14105236549373087746555707392]