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A269916 as a simple table

na(n)
51
65
721
881
9296
101043
113585
1212095
1340221
14132225
15430633
161391623
174467689
1814262766
1945311977
20143343279
21451768405
221419092951
234444424613
2413882255419
2543256925753
26134492621659
27417322590000
281292554593007
293996626787973
3012338508959035
3138037021764053

[1,5,21,81,296,1043,3585,12095,40221,132225,
 430633,1391623,4467689,14262766,45311977,
 143343279,451768405,1419092951,4444424613,
 13882255419,43256925753,134492621659,417322590000,
 1292554593007,3996626787973,12338508959035,
 38037021764053]