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A135721 as a simple table

na(n)
2561
31105
41729
5561
61105
7561
81729
96601
102465
112821
1229341
136601
14334153
1562745
162433601
1774165065
1829341
198911
2010024561
2110585
222508013
2355462177
2462745
2546657
26101101
2752633
2884350561
29188461
30278545
311152271
3218307381
33410041
342628073
3512261061
36838201

[561,1105,1729,561,1105,561,1729,6601,2465,2821,
 29341,6601,334153,62745,2433601,74165065,29341,
 8911,10024561,10585,2508013,55462177,62745,46657,
 101101,52633,84350561,188461,278545,1152271,
 18307381,410041,2628073,12261061,838201]