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%I #9 Jul 03 2017 08:03:51
%S 3,19,163,1459,8803,17497,52489,78787,164617,370387
%N Prime factors of numbers in A289257.
%C Kalmynin conjectures that this sequence is infinite.
%C I have some doubts about terms 17497, 52489, 164617 that are == 1 (mod 8).
%H Alexander Kalmynin, <a href="https://arxiv.org/abs/1611.00417">On Novák numbers</a>, arXiv:1611.00417 [math.NT], 2016. See Theorem 7 p. 11.
%Y Cf. A006521, A057719, A124240, A289257.
%K nonn,more
%O 1,1
%A _Michel Marcus_, Jun 29 2017