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A247737 as a simple table

na(n)
00
10
24
324
4436
53888
629880
7264460
82353136
920400352
10171215320
111430108512
1211962161392
1399523393628
14822501750184
156763177931936
1655433124540308
17453013557727460
183690931980743340
1929988435689294280
20243064471330287696
211965884816120576180

[0,0,4,24,436,3888,29880,264460,2353136,20400352,
 171215320,1430108512,11962161392,99523393628,
 822501750184,6763177931936,55433124540308,
 453013557727460,3690931980743340,
 29988435689294280,243064471330287696,
 1965884816120576180]