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A186801 as a simple table

na(n)
1244558
213730715
3782510382
444618824642
52543130767720
6144968185692408
78263791225579948
8471067696528736345
926852704296317001032
101530709282365815254320
1187256413284003840550168

[244558,13730715,782510382,44618824642,
 2543130767720,144968185692408,8263791225579948,
 471067696528736345,26852704296317001032,
 1530709282365815254320,87256413284003840550168]