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A201990 as a simple table

na(n)
01
11
27
395
41969
555201
61956375
783935039
84230528353
9245059707841
1016043680004903
111171567218325151
1294415150206330641
138323801562833775201
14796927800013656980791
1582342529545666235490431
169132868398860301753027265
171082287792241161814647419265

[1,1,7,95,1969,55201,1956375,83935039,4230528353,
 245059707841,16043680004903,1171567218325151,
 94415150206330641,8323801562833775201,
 796927800013656980791,82342529545666235490431,
 9132868398860301753027265,
 1082287792241161814647419265]