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A257216 as a simple table

na(n)
01
11
213
361
4641
57361
697885
71649229
830854689
9642843937
1015224371661
11389990888189
1210993271348449
13335483217883425
1411002846829430877
15387486984911220301
1614537292404339654849
17579695285888792228033
1824479882396099586816013
191090912648729168031393853
2051183198861577845151704001

[1,1,13,61,641,7361,97885,1649229,30854689,
 642843937,15224371661,389990888189,10993271348449,
 335483217883425,11002846829430877,
 387486984911220301,14537292404339654849,
 579695285888792228033,24479882396099586816013,
 1090912648729168031393853,
 51183198861577845151704001]