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A010992 as a simple table

na(n)
391
4040
41820
4211480
43123410
441086008
458145060
4653524680
47314457495
481677106640
498217822536
5037353738800
51158753389900
52635013559600
532403979904200
548654327655120
5529749251314475
5697997533741800
57310325523515700
58947309492837400
592794563003870330

[1,40,820,11480,123410,1086008,8145060,53524680,
 314457495,1677106640,8217822536,37353738800,
 158753389900,635013559600,2403979904200,
 8654327655120,29749251314475,97997533741800,
 310325523515700,947309492837400,2794563003870330]