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A249894 as a simple table

na(n)
13
236
3361
4361201
536120142809
63612014280924268428225
7361201428092426842822525044572369542546150009

[3,36,361,361201,36120142809,
 3612014280924268428225,
 361201428092426842822525044572369542546150009]