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A327836 as a simple table

na(n)
11
218
364
41250
53888
6235298
72097152
886093442
9250000000
1051874849202
11743008370688
1246596170244962
13396857386627072
1458385852050781250
151152921504606846976
1697322383751333736962
17273238944967337066496
18208254700595822483065682
195242880000000000000000000

[1,18,64,1250,3888,235298,2097152,86093442,
 250000000,51874849202,743008370688,46596170244962,
 396857386627072,58385852050781250,
 1152921504606846976,97322383751333736962,
 273238944967337066496,208254700595822483065682,
 5242880000000000000000000]