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A247724 as a simple table

na(n)
11848
210098
355372
4303924
51668072
69157806
750284864
8276119316
91516191100
108325624724
1145717627824
12251044886360
131378538951008
147569846707486
1541567645474272
16228256866284008
171253407500305364
186882730399010624

[1848,10098,55372,303924,1668072,9157806,50284864,
 276119316,1516191100,8325624724,45717627824,
 251044886360,1378538951008,7569846707486,
 41567645474272,228256866284008,1253407500305364,
 6882730399010624]