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A198257 as a simple table

na(n)
01
16
294
31700
435466
5795312
618848992
7464517468
811801240050
9307073982116
108147186436324
11219664321959524
126003343077661216
13165975724832822400
144634768975107569024
15130553813782898706908
163705740233107582161538
17105902829964290241990332

[1,6,94,1700,35466,795312,18848992,464517468,
 11801240050,307073982116,8147186436324,
 219664321959524,6003343077661216,
 165975724832822400,4634768975107569024,
 130553813782898706908,3705740233107582161538,
 105902829964290241990332]