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A297071 as a simple table

na(n)
121
21201
360779
42883705
5150408381
67919440725
7414777995952
821727028378285
91138816744364625
1059691195859395408
113128607573114280589
12163981279662396372799
138594866332548915855696
14450488649723690452933920

[21,1201,60779,2883705,150408381,7919440725,
 414777995952,21727028378285,1138816744364625,
 59691195859395408,3128607573114280589,
 163981279662396372799,8594866332548915855696,
 450488649723690452933920]