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A206164 as a simple table

na(n)
1641
214182
3463878
410599630
5345652310
67934434238
7257597022598
85939045721006
9191982939898678
104445181274166302
11143088306500843366
123326865018494656782
13106651001017976490518
142489743322080060401278

[641,14182,463878,10599630,345652310,7934434238,
 257597022598,5939045721006,191982939898678,
 4445181274166302,143088306500843366,
 3326865018494656782,106651001017976490518,
 2489743322080060401278]