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A001234 as a simple table

na(n)
71
828
9546
109450
11157773
122637558
1344990231
14790943153
1514409322928
16272803210680
175374523477960
18110228466184200
192353125040549984
2052260903362512720
211206647803780373360
2228939583397335447760

[1,28,546,9450,157773,2637558,44990231,790943153,
 14409322928,272803210680,5374523477960,
 110228466184200,2353125040549984,
 52260903362512720,1206647803780373360,
 28939583397335447760]