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A052857 as a simple table

na(n)
00
11
22
315
4184
53145
668976
71846999
858413440
92130740721
1088061420800
114066862460991
12207556068584448
1311600364266112505
14704664527894104064
1546226086991634882375
163256882066245640093696
17245279323467051422886241

[0,1,2,15,184,3145,68976,1846999,58413440,
 2130740721,88061420800,4066862460991,
 207556068584448,11600364266112505,
 704664527894104064,46226086991634882375,
 3256882066245640093696,245279323467051422886241]