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A018893 as a simple table

na(n)
01
11
211
3375
427897
53817137
6865874115
7303083960103
8155172279680289
9111431990979621729
10108511603921116483579
11139360142400556127213655
12230624017175131841824732233
13482197541715276031774659298833

[1,1,11,375,27897,3817137,865874115,303083960103,
 155172279680289,111431990979621729,
 108511603921116483579,139360142400556127213655,
 230624017175131841824732233,
 482197541715276031774659298833]