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A246477 as a simple table

na(n)
1966
24386
320004
491212
5415650
61893780
78628792
839320988
9179184654
10816514170
113720653346
1216954232310
1377257406100
14352048294158
151604217270528
167310107829838
1733310766859666
18151790888076216
19691682436483000

[966,4386,20004,91212,415650,1893780,8628792,
 39320988,179184654,816514170,3720653346,
 16954232310,77257406100,352048294158,
 1604217270528,7310107829838,33310766859666,
 151790888076216,691682436483000]