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A084785 as a simple table

na(n)
01
12
25
316
466
5348
62298
718504
8176841
91958746
1024661493
11347548376
125415830272
1392410046544
141712819553864
1534258146124320
16735267392077962
1716852848083339700
18410809882438699346
1910611174406149372736
20289493459925589039804
218317946739043065421640

[1,2,5,16,66,348,2298,18504,176841,1958746,
 24661493,347548376,5415830272,92410046544,
 1712819553864,34258146124320,735267392077962,
 16852848083339700,410809882438699346,
 10611174406149372736,289493459925589039804,
 8317946739043065421640]