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A181706 as a simple table

na(n)
11504
230592
38353792
42146926592
534357510144
6549746900992
78796057370624
8140737345748992
99223372000347553792
102361183240850707054592
119671406556879650002305024
12154742504910523000781012992

[1504,30592,8353792,2146926592,34357510144,
 549746900992,8796057370624,140737345748992,
 9223372000347553792,2361183240850707054592,
 9671406556879650002305024,
 154742504910523000781012992]