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%I #8 Jun 06 2021 09:03:07
%S 1,3,9,21,39,63,117,273,819,1467,2067,3081,4269,6201,7299,9243,10269,
%T 12807,14469,16959,19071,20421,21567,23877,29883,43407,48711,50877,
%U 51093,55497,64701,89649,94887,118713,133497,142947,146133,149331
%N Numbers k such that k^3 divides 17^(k^2) + 1.
%C 3 divides a(n) for n > 1.
%Y Cf. A127263 (k^3 divides 2^(k^2) + 1).
%Y Cf. A128678, A128679, A128680, A128681, A128682, A128683, A128684, A128685.
%Y Cf. A177813, A177814, A177816, A177817, A177818, A177819, A177820.
%Y Cf. A128677 (least k > p such that (k*p)^3 divides (p-1)^(k*p)^2+1, where p = prime(n) > 2).
%K nonn
%O 1,2
%A _Alexander Adamchuk_, May 14 2010
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